Well, of them all, oats are probably the least bad. But try to get special gluten free oats and grind your own flour out of them if you can. Usually oats are heavily cross-polluted with wheat not to mention it has its own protein that most many gluten sensitives react to.

And you might talk to a Rabbi, I'm sure you're not the first person to come along that experiences a food sensitivity or allergic reaction to a traditional food. This happens all the time for devout Christians too, especially the Catholics who believe that their bread under goes some sort of transformation.