I have a couple of DVDs about that crazy f*cker. I totally agree. Anyone willing to take a shit on stage and eat it while pissing and fighting the audience after he has broken bottles on his head is definately a nut-job. Check out Hated for a pretty good view of GG live and behind the scenes.
WARNING these links are not work safe
http://www.youtube.com/watch?search=...&v=RCoAL9gCsXA
http://www.youtube.com/watch?v=IbDa3L9yk90&NR
http://www.youtube.com/watch?v=RAqRd9Em-hg&NR