General Music PRO 1 board in PRO 2

I have a GEM Pro 2 with the oh so common dead CPU board, and it’s really hard to find a new one (Unless anyone knows of where I could get one?) but PRO 1 CPU boards to pop up from time to time. Would anyone know how close to being compatible they are? I’ve been told by GEM that the physical connectors on the board are different, but that’s not the end of the world I can adapt it if the signal is compatible.