Sorry but this is not good advice for celiacs. The only way to treat celiacs disease currently is to completely and totally avoid all gluten (gluten that causes celiacs is found in wheat, rye, barley and is a cross contaminate in some oats). This includes contamination from many many sources in prepared foods. Since gluten is a protein, not a carb, it is found in many protein products like many of the bars and such. It is also important to avoid cross contamination on cookware, in restaurants, and on production lines for products that themselves do not contain gluten. While going on a low carb diet might help some symptoms, it won't prevent the long term damage of celiacs if one doesn't watch out for the hidden sources. Long term untreated celiacs suffer from many malabsorption illnesses as well as having an increase risk for intestinal cancers. Some celiacs also suffer from rashes (mostly at pressure points) so that is another symptom that can be used to help diagnose this illness.

Also, to get an accurate reading on a blood test one must be eating gluten so to do a trial gluten free diet will make it much harder to get an accurate diagnosis. As I said in my post, if you suspect celiacs, get the blood test, wait for the results and then get a biopsy before changing your eating habits. The diet is quite restrictive (although full of good food) so getting a diagnosis is improtant to being able to remain motived enough to maintain it for your whole life.