My daughter had some markers, but we found out she did not have Celiac's, so we are not completely gluten-free here, but do try to cut down (and eliminated it while we weren't sure)
Good substitutes for typical gluten things-
corn tortillas instead of flour ones or bread (look online if you can't find GF ones in your grocery store)
spaghetti squash instead of pasta, with typical sauce or veggies, etc
there are lots of GF snacks at Meijer and Trader Joe's. I also use a great organic grocery delivery service that is local (Oswego- delivers all over IL) www.naturaldirect.com (If you let them know I referred you, we both get discount)
Make sure you get separate pots and pans to cook GF in. You can get cross-contamination if you don't. You can't use your toaster or toaster oven because of cross-contamination of crumbs, and some people say not to even use your dishwasher. I have a friend who bought herself a set of red pots and pans to make sure everyone knew those were the GF ones.
If you want further, specific testing, HomeFirst does a test called Meridian Stress Test (MSA) that is a pressure test and you get the results in about an hour and it isn't painful at all. They do specific food by specific food and it's really helpful. It cost us $100 out of pocket, but SO worth it!
Hope this helps. I have a great book called, "Breaking the vicious cycle"
:)
M.