gamma-aminobutyric acid:sodium:chloride symporter activity gamma-aminobutyric acid transmembrane transporter activity amino-acid betaine transmembrane transporter activity solute:sodium symporter activity obsolete betaine/GABA:sodium symporter activity true OBSOLETE. Catalysis of the reaction: (betaine or gamma-aminobutyric acid)(out) + Na+(out) = (betaine or gamma-aminobutyric acid)(in) + Na+(in). GO:0015376 molecular_function betaine/GABA:sodium symporter activity This term was made obsolete because it represents a multifunctional gene product.