Enables GABA receptor binding activity. Predicted to be involved in negative regulation of transcription by RNA polymerase I and negative regulation of transcription by RNA polymerase III. Located in several cellular components, including dendrite; inhibitory synapse; and perinuclear region of cytoplasm. Orthologous to human MAF1 (MAF1 homolog, negative regulator of RNA polymerase III). [provided by Alliance of Genome Resources, Apr 2022]