Enables DNA binding activity. Involved in several processes, including asymmetric protein localization involved in cell fate determination; cytoskeleton organization; and nervous system development. Located in apical cortex. Is expressed in several structures, including CNS glial cell; ganglia; germline cell; organism subdivision; and photoreceptor neurons. Human ortholog(s) of this gene implicated in achromatopsia 4; color blindness; congenital stationary night blindness 1G; congenital stationary night blindness autosomal dominant 3; and night blindness. Orthologous to several human genes including GNAI1 (G protein subunit alpha i1); GNAI2 (G protein subunit alpha i2); and GNAI3 (G protein subunit alpha i3).