Enables glucagon receptor activity and peptide hormone binding activity. Involved in adenylate cyclase-activating G protein-coupled receptor signaling pathway; exocytosis; and hormone-mediated signaling pathway. Located in endosome and plasma membrane. Human ortholog(s) of this gene implicated in Mahvash Disease and type 2 diabetes mellitus. Orthologous to human GCGR (glucagon receptor). [provided by Alliance of Genome Resources, Apr 2022]