I noticed in Walmart the gluten free food aisle has expanded to include about anything you could want in gluten free foods.
Lots of flours, mixes, cereals, pastas, ready made foods too. Unless you have the test for gluten it could be the gall bladder causing the problem. The symptoms are about the same but the gall bladder can turn to cancer if left untreated. Be sure and get the tests done by a specialist. DD found out the hard way it wasn't the gluten she had to avoid even though it made her feel better. She went to a general MD. first and immediately he said try to avoid gluten and see if that helped and if it did it was probably the cause. NOT! After two specialists, her gall bladder was taken out and if left for a few more years it would have been cancerous. It was full of cholesterol (not the kind in that effects the heart) that does not show up on scans or dye injections. Please get the confirmation is it gluten that causes the problem. :-)