As a novel subset of WSNs, Wireless Multimedia Sensor Networks (WMSNs) were created to meet the stringent Quality of Service (QoS) requirements of today's software. Cross-layer multipath routing seems to be a workable solution for dealing with the peculiarities of WMSNs. Yet, because the underlying channel is broadcast, inter-path interference might affect many different paths. Low-power wireless connections are also asymmetric, susceptible to errors, and unstable. In order to guarantee the efficiency of routing protocols, accurate and consistent connection quality estimation is essential. This study presents GMR-INTERPATH, an inter-path interference protocol for wireless sensor networks that uses a neighbour identification approach, RRQ and RRP algorithms, and a route discovery algorithm to find different node-disjoint paths in a compliant network. With the intention of reducing interference between neighbouring routes, this cross-layer routing strategy selects forwarding nodes using a triangle connection quality metric, remaining energy, and distance. Additionally, the GMR protocol does not need the Request-To-Send/Clear-To-Send (RTS/CTS) handshake mechanism, which is often used to circumvent the Hidden Node Problem (HNP) at the sink node.