diff --git a/doc/source/user/proxies/block_storage_v3.rst b/doc/source/user/proxies/block_storage_v3.rst
index d1e3ecf31..73ff27cfd 100644
--- a/doc/source/user/proxies/block_storage_v3.rst
+++ b/doc/source/user/proxies/block_storage_v3.rst
@@ -70,6 +70,10 @@ Group Type Operations
   :noindex:
   :members: create_group_type, delete_group_type, update_group_type,
             get_group_type, find_group_type, group_types,
+            fetch_group_type_group_specs, create_group_type_group_specs,
+            get_group_type_group_specs_property,
+            update_group_type_group_specs_property,
+            delete_group_type_group_specs_property
 
 Type Operations
 ^^^^^^^^^^^^^^^
diff --git a/openstack/block_storage/v3/_proxy.py b/openstack/block_storage/v3/_proxy.py
index c1df06ce5..5570f8188 100644
--- a/openstack/block_storage/v3/_proxy.py
+++ b/openstack/block_storage/v3/_proxy.py
@@ -1082,6 +1082,66 @@ class Proxy(_base_proxy.BaseBlockStorageProxy):
         return self._update(
             _group_type.GroupType, group_type, **attrs)
 
+    def fetch_group_type_group_specs(self, group_type):
+        """Lists group specs of a group type.
+
+        :param group_type: Either the ID of a group type or a
+            :class:`~openstack.block_storage.v3.group_type.GroupType` instance.
+
+        :returns: One :class:`~openstack.block_storage.v3.group_type.GroupType`
+        """
+        group_type = self._get_resource(_group_type.GroupType, group_type)
+        return group_type.fetch_group_specs(self)
+
+    def create_group_type_group_specs(self, group_type, group_specs):
+        """Create group specs for a group type.
+
+        :param group_type: Either the ID of a group type or a
+            :class:`~openstack.block_storage.v3.group_type.GroupType` instance.
+        :param dict group_specs: dict of extra specs
+
+        :returns: One :class:`~openstack.block_storage.v3.group_type.GroupType`
+        """
+        group_type = self._get_resource(_group_type.GroupType, group_type)
+        return group_type.create_group_specs(self, specs=group_specs)
+
+    def get_group_type_group_specs_property(self, group_type, prop):
+        """Retrieve a group spec property for a group type.
+
+        :param group_type: Either the ID of a group type or a
+            :class:`~openstack.block_storage.v3.group_type.GroupType` instance.
+        :param str prop: Property name.
+
+        :returns: String value of the requested property.
+        """
+        group_type = self._get_resource(_group_type.GroupType, group_type)
+        return group_type.get_group_specs_property(self, prop)
+
+    def update_group_type_group_specs_property(self, group_type, prop, val):
+        """Update a group spec property for a group type.
+
+        :param group_type: Either the ID of a group type or a
+            :class:`~openstack.block_storage.v3.group_type.GroupType` instance.
+        :param str prop: Property name.
+        :param str val: Property value.
+
+        :returns: String value of the requested property.
+        """
+        group_type = self._get_resource(_group_type.GroupType, group_type)
+        return group_type.update_group_specs_property(self, prop, val)
+
+    def delete_group_type_group_specs_property(self, group_type, prop):
+        """Delete a group spec property from a group type.
+
+        :param group_type: Either the ID of a group type or a
+            :class:`~openstack.block_storage.v3.group_type.GroupType` instance.
+        :param str prop: Property name.
+
+        :returns: None
+        """
+        group_type = self._get_resource(_group_type.GroupType, group_type)
+        return group_type.delete_group_specs_property(self, prop)
+
     # ====== QUOTA SETS ======
     def get_quota_set(self, project, usage=False, **query):
         """Show quota set information for the project
diff --git a/openstack/block_storage/v3/group_type.py b/openstack/block_storage/v3/group_type.py
index 89f18e4f9..4f23528d2 100644
--- a/openstack/block_storage/v3/group_type.py
+++ b/openstack/block_storage/v3/group_type.py
@@ -10,7 +10,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from openstack import exceptions
 from openstack import resource
+from openstack import utils
 
 
 class GroupType(resource.Resource):
@@ -31,6 +33,90 @@ class GroupType(resource.Resource):
     #: The group type description.
     description = resource.Body("description")
     #: Contains the specifications for a group type.
-    group_specs = resource.Body("group_specs", type=dict)
+    group_specs = resource.Body("group_specs", type=dict, default={})
     #: Whether the group type is publicly visible.
     is_public = resource.Body("is_public", type=bool)
+
+    def fetch_group_specs(self, session):
+        """Fetch group_specs of the group type.
+
+        These are returned by default if the user has suitable permissions
+        (i.e. you're an admin) but by default you also need the same
+        permissions to access this API. That means this function is kind of
+        useless. However, that is how the API was designed and it is
+        theoretically possible that people will have modified their policy to
+        allow this but not the other so we provide this anyway.
+
+        :param session: The session to use for making this request.
+        :returns: An updated version of this object.
+        """
+        url = utils.urljoin(GroupType.base_path, self.id, 'group_specs')
+        microversion = self._get_microversion_for(session, 'fetch')
+        response = session.get(url, microversion=microversion)
+        exceptions.raise_from_response(response)
+        specs = response.json().get('group_specs', {})
+        self._update(group_specs=specs)
+        return self
+
+    def create_group_specs(self, session, specs):
+        """Creates group specs for the group type.
+
+        This will override whatever specs are already present on the group
+        type.
+
+        :param session: The session to use for making this request.
+        :param specs: A dict of group specs to set on the group type.
+        :returns: An updated version of this object.
+        """
+        url = utils.urljoin(GroupType.base_path, self.id, 'group_specs')
+        microversion = self._get_microversion_for(session, 'create')
+        response = session.post(
+            url, json={'group_specs': specs}, microversion=microversion,
+        )
+        exceptions.raise_from_response(response)
+        specs = response.json().get('group_specs', {})
+        self._update(group_specs=specs)
+        return self
+
+    def get_group_specs_property(self, session, prop):
+        """Retrieve a group spec property of the group type.
+
+        :param session: The session to use for making this request.
+        :param prop: The name of the group spec property to update.
+        :returns: The value of the group spec property.
+        """
+        url = utils.urljoin(GroupType.base_path, self.id, 'group_specs', prop)
+        microversion = self._get_microversion_for(session, 'fetch')
+        response = session.get(url, microversion=microversion)
+        exceptions.raise_from_response(response)
+        val = response.json().get(prop)
+        return val
+
+    def update_group_specs_property(self, session, prop, val):
+        """Update a group spec property of the group type.
+
+        :param session: The session to use for making this request.
+        :param prop: The name of the group spec property to update.
+        :param val: The value to set for the group spec property.
+        :returns: The updated value of the group spec property.
+        """
+        url = utils.urljoin(GroupType.base_path, self.id, 'group_specs', prop)
+        microversion = self._get_microversion_for(session, 'commit')
+        response = session.put(
+            url, json={prop: val}, microversion=microversion
+        )
+        exceptions.raise_from_response(response)
+        val = response.json().get(prop)
+        return val
+
+    def delete_group_specs_property(self, session, prop):
+        """Delete a group spec property from the group type.
+
+        :param session: The session to use for making this request.
+        :param prop: The name of the group spec property to delete.
+        :returns: None
+        """
+        url = utils.urljoin(GroupType.base_path, self.id, 'group_specs', prop)
+        microversion = self._get_microversion_for(session, 'delete')
+        response = session.delete(url, microversion=microversion)
+        exceptions.raise_from_response(response)
diff --git a/openstack/tests/functional/block_storage/v3/test_group.py b/openstack/tests/functional/block_storage/v3/test_group.py
new file mode 100644
index 000000000..33e37ffba
--- /dev/null
+++ b/openstack/tests/functional/block_storage/v3/test_group.py
@@ -0,0 +1,103 @@
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+from openstack.block_storage.v3 import group_type as _group_type
+from openstack.tests.functional.block_storage.v3 import base
+
+
+class TestGroup(base.BaseBlockStorageTest):
+    # TODO(stephenfin): We should use setUpClass here for MOAR SPEED!!!
+    def setUp(self):
+        super().setUp()
+
+        if not self.user_cloud.has_service('block-storage'):
+            self.skipTest('block-storage service not supported by cloud')
+
+        group_type_name = self.getUniqueString()
+        self.group_type = self.conn.block_storage.create_group_type(
+            name=group_type_name,
+        )
+        self.addCleanup(
+            self.conn.block_storage.delete_group_type,
+            self.group_type,
+        )
+        self.assertIsInstance(self.group_type, _group_type.GroupType)
+        self.assertEqual(group_type_name, self.group_type.name)
+
+    def test_group_type(self):
+        # get
+        group_type = self.conn.block_storage.get_group_type(self.group_type)
+        self.assertEqual(self.group_type.name, group_type.name)
+
+        # find
+        group_type = self.conn.block_storage.find_group_type(
+            self.group_type.name,
+        )
+        self.assertEqual(self.group_type.id, group_type.id)
+
+        # list
+        group_types = list(self.conn.block_storage.group_types())
+        # other tests may have created group types and there can be defaults so
+        # we don't assert that this is the *only* group type present
+        self.assertIn(self.group_type.id, {g.id for g in group_types})
+
+        # update
+        group_type_name = self.getUniqueString()
+        group_type_description = self.getUniqueString()
+        group_type = self.conn.block_storage.update_group_type(
+            self.group_type,
+            name=group_type_name,
+            description=group_type_description,
+        )
+        self.assertIsInstance(group_type, _group_type.GroupType)
+        group_type = self.conn.block_storage.get_group_type(self.group_type.id)
+        self.assertEqual(group_type_name, group_type.name)
+        self.assertEqual(group_type_description, group_type.description)
+
+    def test_group_type_group_specs(self):
+        # create
+        group_type = self.conn.block_storage.create_group_type_group_specs(
+            self.group_type,
+            {'foo': 'bar', 'acme': 'buzz'},
+        )
+        self.assertIsInstance(group_type, _group_type.GroupType)
+        group_type = self.conn.block_storage.get_group_type(self.group_type.id)
+        self.assertEqual(
+            {'foo': 'bar', 'acme': 'buzz'}, group_type.group_specs
+        )
+
+        # get
+        spec = self.conn.block_storage.get_group_type_group_specs_property(
+            self.group_type,
+            'foo',
+        )
+        self.assertEqual('bar', spec)
+
+        # update
+        spec = self.conn.block_storage.update_group_type_group_specs_property(
+            self.group_type,
+            'foo',
+            'baz',
+        )
+        self.assertEqual('baz', spec)
+        group_type = self.conn.block_storage.get_group_type(self.group_type.id)
+        self.assertEqual(
+            {'foo': 'baz', 'acme': 'buzz'}, group_type.group_specs
+        )
+
+        # delete
+        self.conn.block_storage.delete_group_type_group_specs_property(
+            self.group_type,
+            'foo',
+        )
+        group_type = self.conn.block_storage.get_group_type(self.group_type.id)
+        self.assertEqual({'acme': 'buzz'}, group_type.group_specs)
diff --git a/openstack/tests/functional/block_storage/v3/test_group_type.py b/openstack/tests/functional/block_storage/v3/test_group_type.py
deleted file mode 100644
index 0ca5252a8..000000000
--- a/openstack/tests/functional/block_storage/v3/test_group_type.py
+++ /dev/null
@@ -1,39 +0,0 @@
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-from openstack.block_storage.v3 import group_type as _group_type
-from openstack.tests.functional.block_storage.v3 import base
-
-
-class TestGroupType(base.BaseBlockStorageTest):
-
-    def setUp(self):
-        super(TestGroupType, self).setUp()
-
-        self.GROUP_TYPE_NAME = self.getUniqueString()
-        self.GROUP_TYPE_ID = None
-
-        group_type = self.conn.block_storage.create_group_type(
-            name=self.GROUP_TYPE_NAME)
-        self.assertIsInstance(group_type, _group_type.GroupType)
-        self.assertEqual(self.GROUP_TYPE_NAME, group_type.name)
-        self.GROUP_TYPE_ID = group_type.id
-
-    def tearDown(self):
-        group_type = self.conn.block_storage.delete_group_type(
-            self.GROUP_TYPE_ID, ignore_missing=False)
-        self.assertIsNone(group_type)
-        super(TestGroupType, self).tearDown()
-
-    def test_get(self):
-        group_type = self.conn.block_storage.get_group_type(self.GROUP_TYPE_ID)
-        self.assertEqual(self.GROUP_TYPE_NAME, group_type.name)
diff --git a/openstack/tests/unit/block_storage/v3/test_group_type.py b/openstack/tests/unit/block_storage/v3/test_group_type.py
index 541339dcb..842e4de43 100644
--- a/openstack/tests/unit/block_storage/v3/test_group_type.py
+++ b/openstack/tests/unit/block_storage/v3/test_group_type.py
@@ -10,6 +10,10 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
+
+from keystoneauth1 import adapter
+
 from openstack.block_storage.v3 import group_type
 from openstack.tests.unit import base
 
@@ -18,13 +22,16 @@ GROUP_TYPE = {
     "name": "grp-type-001",
     "description": "group type 001",
     "is_public": True,
-    "group_specs": {
-        "consistent_group_snapshot_enabled": "<is> False"
-    }
+    "group_specs": {"consistent_group_snapshot_enabled": "<is> False"},
 }
 
 
 class TestGroupType(base.TestCase):
+    def setUp(self):
+        super().setUp()
+        self.sess = mock.Mock(spec=adapter.Adapter)
+        self.sess.default_microversion = 1
+        self.sess._get_connection = mock.Mock(return_value=self.cloud)
 
     def test_basic(self):
         resource = group_type.GroupType()
@@ -44,3 +51,93 @@ class TestGroupType(base.TestCase):
         self.assertEqual(GROUP_TYPE["description"], resource.description)
         self.assertEqual(GROUP_TYPE["is_public"], resource.is_public)
         self.assertEqual(GROUP_TYPE["group_specs"], resource.group_specs)
+
+    def test_fetch_group_specs(self):
+        sot = group_type.GroupType(**GROUP_TYPE)
+        resp = mock.Mock()
+        resp.body = {'group_specs': {'a': 'b', 'c': 'd'}}
+        resp.json = mock.Mock(return_value=resp.body)
+        resp.status_code = 200
+        self.sess.get = mock.Mock(return_value=resp)
+
+        rsp = sot.fetch_group_specs(self.sess)
+
+        self.sess.get.assert_called_with(
+            f"group_types/{GROUP_TYPE['id']}/group_specs",
+            microversion=self.sess.default_microversion,
+        )
+
+        self.assertEqual(resp.body['group_specs'], rsp.group_specs)
+        self.assertIsInstance(rsp, group_type.GroupType)
+
+    def test_create_group_specs(self):
+        sot = group_type.GroupType(**GROUP_TYPE)
+        specs = {'a': 'b', 'c': 'd'}
+        resp = mock.Mock()
+        resp.body = {'group_specs': specs}
+        resp.json = mock.Mock(return_value=resp.body)
+        resp.status_code = 200
+        self.sess.post = mock.Mock(return_value=resp)
+
+        rsp = sot.create_group_specs(self.sess, specs)
+
+        self.sess.post.assert_called_with(
+            f"group_types/{GROUP_TYPE['id']}/group_specs",
+            json={'group_specs': specs},
+            microversion=self.sess.default_microversion,
+        )
+
+        self.assertEqual(resp.body['group_specs'], rsp.group_specs)
+        self.assertIsInstance(rsp, group_type.GroupType)
+
+    def test_get_group_specs_property(self):
+        sot = group_type.GroupType(**GROUP_TYPE)
+        resp = mock.Mock()
+        resp.body = {'a': 'b'}
+        resp.json = mock.Mock(return_value=resp.body)
+        resp.status_code = 200
+        self.sess.get = mock.Mock(return_value=resp)
+
+        rsp = sot.get_group_specs_property(self.sess, 'a')
+
+        self.sess.get.assert_called_with(
+            f"group_types/{GROUP_TYPE['id']}/group_specs/a",
+            microversion=self.sess.default_microversion,
+        )
+
+        self.assertEqual('b', rsp)
+
+    def test_update_group_specs_property(self):
+        sot = group_type.GroupType(**GROUP_TYPE)
+        resp = mock.Mock()
+        resp.body = {'a': 'b'}
+        resp.json = mock.Mock(return_value=resp.body)
+        resp.status_code = 200
+        self.sess.put = mock.Mock(return_value=resp)
+
+        rsp = sot.update_group_specs_property(self.sess, 'a', 'b')
+
+        self.sess.put.assert_called_with(
+            f"group_types/{GROUP_TYPE['id']}/group_specs/a",
+            json={'a': 'b'},
+            microversion=self.sess.default_microversion,
+        )
+
+        self.assertEqual('b', rsp)
+
+    def test_delete_group_specs_property(self):
+        sot = group_type.GroupType(**GROUP_TYPE)
+        resp = mock.Mock()
+        resp.body = None
+        resp.json = mock.Mock(return_value=resp.body)
+        resp.status_code = 200
+        self.sess.delete = mock.Mock(return_value=resp)
+
+        rsp = sot.delete_group_specs_property(self.sess, 'a')
+
+        self.sess.delete.assert_called_with(
+            f"group_types/{GROUP_TYPE['id']}/group_specs/a",
+            microversion=self.sess.default_microversion,
+        )
+
+        self.assertIsNone(rsp)
diff --git a/openstack/tests/unit/block_storage/v3/test_proxy.py b/openstack/tests/unit/block_storage/v3/test_proxy.py
index f2fa6b324..790f6cc34 100644
--- a/openstack/tests/unit/block_storage/v3/test_proxy.py
+++ b/openstack/tests/unit/block_storage/v3/test_proxy.py
@@ -169,6 +169,47 @@ class TestGroupType(TestVolumeProxy):
     def test_group_type_update(self):
         self.verify_update(self.proxy.update_group_type, group_type.GroupType)
 
+    def test_group_type_fetch_group_specs(self):
+        self._verify(
+            "openstack.block_storage.v3.group_type.GroupType.fetch_group_specs",  # noqa: E501
+            self.proxy.fetch_group_type_group_specs,
+            method_args=["value"],
+            expected_args=[self.proxy],
+        )
+
+    def test_group_type_create_group_specs(self):
+        self._verify(
+            "openstack.block_storage.v3.group_type.GroupType.create_group_specs",  # noqa: E501
+            self.proxy.create_group_type_group_specs,
+            method_args=["value", {'a': 'b'}],
+            expected_args=[self.proxy],
+            expected_kwargs={"specs": {'a': 'b'}},
+        )
+
+    def test_group_type_get_group_specs_prop(self):
+        self._verify(
+            "openstack.block_storage.v3.group_type.GroupType.get_group_specs_property",  # noqa: E501
+            self.proxy.get_group_type_group_specs_property,
+            method_args=["value", "prop"],
+            expected_args=[self.proxy, "prop"],
+        )
+
+    def test_group_type_update_group_specs_prop(self):
+        self._verify(
+            "openstack.block_storage.v3.group_type.GroupType.update_group_specs_property",  # noqa: E501
+            self.proxy.update_group_type_group_specs_property,
+            method_args=["value", "prop", "val"],
+            expected_args=[self.proxy, "prop", "val"],
+        )
+
+    def test_group_type_delete_group_specs_prop(self):
+        self._verify(
+            "openstack.block_storage.v3.group_type.GroupType.delete_group_specs_property",  # noqa: E501
+            self.proxy.delete_group_type_group_specs_property,
+            method_args=["value", "prop"],
+            expected_args=[self.proxy, "prop"],
+        )
+
 
 class TestExtension(TestVolumeProxy):
     def test_extensions(self):
diff --git a/releasenotes/notes/add-block-storage-group-type-group-specs-d07047167224ec83.yaml b/releasenotes/notes/add-block-storage-group-type-group-specs-d07047167224ec83.yaml
new file mode 100644
index 000000000..50ae352a0
--- /dev/null
+++ b/releasenotes/notes/add-block-storage-group-type-group-specs-d07047167224ec83.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Add support for creating, updating and deleting group type group specs for
+    the block storage service.