A big round of applause for Eke and Bootsector because without their help this would not have been possible.
After beating my head against a wall for a year or so trying to get this dumped I finally gave up and contacted Eke. Using the SGC Explorer designed by Bootsector he was able to pull a working dump from the cartridge and document the protection. He currently has all the routines implemented in the Wii version of Gens Plus GX 1.7.3.
It is currently possible to run Gens Plus GX under a Windows environment but I will let Bootsector explain that.
Super Mario World 64 ROM