This command shall be generated in response to KeySetReadAllIndices and it shall contain the list of GroupKeySetID for all Group Key Sets associated with the scoped Fabric.
MatterSpecification.v13.Core § 11.2.7.6
This field references the set of group keys that generate operational group keys for use with the accessing fabric.
Each entry in GroupKeySetIDs is a GroupKeySetID field.
MatterSpecification.v13.Core § 11.2.7.6.1
This command shall be generated in response to KeySetReadAllIndices and it shall contain the list of GroupKeySetID for all Group Key Sets associated with the scoped Fabric.
See
MatterSpecification.v13.Core § 11.2.7.6