M.
Before taking anyone's advice here (since no one who has yet replied has any 1st hand experience with neeing to be gluten-free), I really recommend that you search for and join gluten free support groups/forums online and then ASK THERE. Only other people who are in your shoes (trying to live a gluten-free diet) would be able to accurately direct you towards gluten-free skincare. If you are sensitive to gluten in your diet, you can very easily also react to gluten on your skin, so you are quite astute to be searching for gluten free skincare.
Searching in Yahoo Groups using the keyword "gluten" you already get a good list of groups, and I see several good groups listed in just the 1st two pages, such as SillyYaks, livingwheatandglutenfree, and celiacsupport:
http://groups.yahoo.com/search?query=gluten
Best of luck!