Wow -- I remember the GG!  I used to stay in South San Francisco  on business trips and made the trip across the Bay Bridge as often as possible.  It was an amazing place -- a throw-back brothel out of the Old West -- red velvet carpet and chairs, etc.  My memory is really fuzzy, but I do remember having great sessions with a tall blonde, a tall African American and a shot & cute Asian.  I think there was a similar place also on Telegraph, but I never went there.  

If I remember correctly, GG was on Shattuck. Very fine place.  But I lived on the south side when I went to Cal and so visited the Telegraph Ave. place which I thought had a more discrete front entry.  I loved the line ups.