Enables several functions, including G protein-coupled receptor binding activity; GTP binding activity; and GTPase activating protein binding activity. Involved in several processes, including nervous system development; positive regulation of GTPase activity; and response to morphine. Located in membrane; myelin sheath; and neuron projection. Human ortholog(s) of this gene implicated in developmental and epileptic encephalopathy 17 and neurodevelopmental disorder with involuntary movements. Orthologous to human GNAO1 (G protein subunit alpha o1). [provided by Alliance of Genome Resources, Apr 2022]