Enables olfactory receptor binding activity. Is involved in several processes, including hyperosmotic response; olfactory behavior; and response to odorant. Located in neuronal cell body and non-motile cilium. Is expressed in amphid neurons. Human ortholog(s) of this gene are implicated in early infantile epileptic encephalopathy 17. Is an ortholog of human GNAI1 (G protein subunit alpha i1
); GNAO1 (G protein subunit alpha o1
); and GNAZ (G protein subunit alpha z).