Enables G-protein alpha-subunit binding activity and GTPase activator activity. Involved in termination of G protein-coupled receptor signaling pathway. Located in several cellular components, including apical dendrite; cytosol; and neuronal cell body. Part of protein-containing complex. Colocalizes with synapse. Orthologous to human RGS12 (regulator of G protein signaling 12). [provided by Alliance of Genome Resources, Apr 2022]