Enables guanylate cyclase activity and protein homodimerization activity. Involved in cGMP-mediated signaling. Located in photoreceptor outer segment membrane. Human ortholog(s) of this gene implicated in Leber congenital amaurosis 1; choroidal sclerosis; cone-rod dystrophy 6; congenital stationary night blindness; and retinitis pigmentosa. Orthologous to human GUCY2D (guanylate cyclase 2D, retinal). [provided by Alliance of Genome Resources, Apr 2022]