Hi
I have been a coeliac my whole life and that has not stopped me becoming a bodybuilding champion! In fact, I think having to follow a gluten free diet is a distinct advantage when it comes to bodybuilding, because you're already conditioned to eating lots of fresh fruit and vegetables, lots of lean meat and fish, eggs, rice and not eating processed, packaged 'convenience' crap or takeaway foods. So when it comes to cutting down for competition guess what you eat - lots of lean meat and fish, fresh fruit and vegetables, eggs and rice - hmm...remarkably similar to your normal diet!
Go gluten free and watch your condition improve out of sight.