The function of ENSG00000182256 (GABRG3, gamma-aminobutyric acid type A receptor subunit gamma3) is as follows. Gamma subunit of the heteropentameric ligand-gated chloride channel gated by gamma-aminobutyric acid (GABA), a major inhibitory neurotransmitter in the brain (By similarity). GABA-gated chloride channels, also named GABA(A) receptors (GABAAR), consist of five subunits arranged around a central pore and contain GABA active binding site(s) located at the alpha and beta subunit interface(s) (By similarity). When activated by GABA, GABAARs selectively allow the flow of chloride across the cell membrane down their electrochemical gradient (By similarity). {ECO:0000250|UniProtKB:P18507, ECO:0000250|UniProtKB:P28473}.