I had the displeasure of seeing Chicken John perform "P.G. Allen" once in S.F. Baby Ruths replaced the fecal matter. It was pretty dumb. The two times I was supposed to go see GG play #1 my ride OD'd, and #2 he ended up not playing because the L.A. band wouldn't let them use their gear without a fee.
I had tried to book him through Merle for a show in the Palm Springs area promising $400 and my band's gear to use on that tour, but Merle said "I wouldn't play my living room for less than 600!".
Sorry, it's a sore spot with me that I never got to see him live! Did get a lot of footage from Merle and Pete De Mattia back in the day though...the Jabbers stuff is still my favorite.