Enables gamma-aminobutyric acid:proton symporter activity and glycine transmembrane transporter activity. Acts upstream of or within glycine transport. Located in several cellular components, including cone cell pedicle; dendrite terminus; and inhibitory synapse. Is expressed in several structures, including cardiovascular system; eye; genitourinary system; nervous system; and skeleton. Used to study temporal lobe epilepsy. Orthologous to human SLC32A1 (solute carrier family 32 member 1). [provided by Alliance of Genome Resources, Apr 2022]