Genetic Zone Routing Protocol (GZRP), a new multi path routing protocol for MANETs, is an extension of ZRP by using Genetic Algorithm (GA). GZRP uses GA on IERP and BRP parts of ZRP to provide a limited set of alternative routes to the destination in order to load-balance the network and robust when node/link failure occurs during the route discovery process. GZRP is studied for its performance and compared to AOMDV, another multi path routing protocol extended from AODV, a source routing protocol. The performance analysis is made using GloMoSim 2.03. The results of the comparison show that GZRP is 3% better than AOMDV.