I believe that Gerald's band gigged quite a bit around the LA area in the 1960s but rarely ventured beyond this area I believe. Hence they were one of LA's best kept secrets for a long time. The booklet for the Mosaic set (which is still in print ) includes a photo of the band gigging at Memory Lane, Hollywood.
The two CDs mentioned earlier ('Jenna' and 'Calafia' were recorded for Albert Marx on Discovery and can be recommended (as also can the releases 'Jessica' and 'Lomelin'). Good stuff - although a bit of a shame about the digital sound.
Gerald's coming to London in 2 weeks time for a rare UK gig as part of the London Jazz Festival and I'm counting the days down in eager anticipation..