Have you tried turning off all of the 060 CPU caches before running the GG software? Keropi has a small batch file that does this and launches the software. Also, the manual states that the Vortex GG board REQUIRES parity (9) chip SIMMs to operate properly, although I have had mine running with 8 chip ones.
Perhaps trying a different Zorro slot might help. My Vortex will only run in my 4000 in the top slot. I never could get it running in my 2000, although I didn't really spend that much time trying.
Good Luck,
-Jeff