Enables cGMP binding activity and cGMP-dependent protein kinase activity. Involved in protein phosphorylation and signal transduction. Acts upstream of or within cGMP-mediated signaling; nervous system development; and relaxation of vascular associated smooth muscle. Located in Golgi apparatus and plasma membrane. Is expressed in several structures, including bone; central nervous system; genitourinary system; gut; and respiratory system. Human ortholog(s) of this gene implicated in thoracic aortic aneurysm. Orthologous to human PRKG1 (protein kinase cGMP-dependent 1). [provided by Alliance of Genome Resources, Apr 2022]