Guanylate cyclase involved in the production of the second messenger cGMP (By similarity). GTP = 3',5'-cyclic GMP + diphosphate Expressed asymmetrically in ASE right (ASER) sensory neuron and bilaterally in ASI sensory neurons. Expressed in PVT interneuron. The protein kinase domain is predicted to be catalytically inactive. Belongs to the adenylyl cyclase class-4/guanylyl cyclase family.