Child custody case, using a GAL, do they tend to help non-custodial parent more?

Steer clear of using a GAL. Even in really bad cases they side on joint visitation. My ex had our GAL completely fooled into thinking he was a complete angel and that I was being a B****! He was an alcoholic and a drug addict and she thought he could be capable of being a responsible parent! I mean hard core drugs not just pot!