Enables gamma-aminobutyric acid:sodium symporter activity and neurotransmitter binding activity. Involved in brain development; neurotransmitter reuptake; and response to xenobiotic stimulus. Located in cell projection; cytoplasm; and membrane. Is active in GABA-ergic synapse. Is integral component of postsynaptic membrane and integral component of presynaptic membrane. Biomarker of visual epilepsy. Orthologous to human SLC6A11 (solute carrier family 6 member 11). [provided by Alliance of Genome Resources, Apr 2022]