During ventral cord development, required for axon fasciculation and navigation, mediating both pioneer and follower axon extension, guidance and track formation (PubMed:20876647, PubMed:22442082, PubMed:23376536, PubMed:28846083). Acts in CEPsh glia and SubL neurons to guide follower axons into the nerve ring (PubMed:28846083). Promotes motorneuron development by positively regulating the extension of the anterior neurite of ventral D-type GABAergic motorneurons along the anterior-posterior axis of the ventral nerve cord (PubMed:23376536). Plays a role in synaptogenesis by regulating synaptic vesicle accumulation at GABAergic and cholinergic neuromuscular junctions (PubMed:22442082). In embryos, localizes to axons in the nerve ring, the tail and along dendrites of sensory neurons. Expressed in a region of neuropil around the nerve ring and the ventral cord (at protein level) (PubMed:22442082). Expressed in the head, tail, ventral cord, nerve ring and neurons including HSN neurons (PubMed:20876647). Expressed in DA, VA, and VB and weakly in the DB cholinergic neurons (PubMed:22442082). Not expressed in ventral D-type GABAergic motorneurons (PubMed:22442082). Expressed throughout development (PubMed:20876647). In embryos, first expressed in neuronal precursor cells during gastrulation (PubMed:20876647). At the comma and 1.5-fold embryonic stage, expressed in neurons in the head, the tail and along the ventral cord (PubMed:20876647). In 1.5-fold stage embryos, expressed in the nerve ring bundle (PubMed:28846083). At the L1 larval stage, expressed in the ventral nerve cord and in a subset of dorsal D-type GABAergic motorneurons (PubMed:22442082, PubMed:23376536). At the L2 larval stage, expressed along the ventral nerve cord (PubMed:23376536). Not expressed in ventral D-type GABAergic motorneurons at the L2 larval stage (PubMed:23376536). Belongs to the G-protein coupled receptor 2 family. LN-TM7 subfamily.