Predicted to enable G-protein beta/gamma-subunit complex binding activity; GTP binding activity; and GTPase activity. Predicted to be involved in G protein-coupled receptor signaling pathway. Is an ortholog of C. elegans gsa-1. In C. elegans, gsa-1 is involved in several processes, including negative regulation of protein kinase C signaling; nematode pharyngeal pumping; and positive regulation of oocyte maturation.