I have several gluten-intolerant people in my life, and though I haven't taken them camping, here's how I would feed them.
Breakfast: for a short trip, bring some gluten-free muffins or bagels. For a longer trip, learn how to make a dough (premix the rice flour, xanthan gum etc at home) you can rise and then fry into English muffins. Not kidding, we did this on trips with small children and it's very feasible to make a batch of dough on arrival at the site, let it rise, and cook muffins after dinner. Jam, peanut butter or both on a muffin is a nice start to the morning. I've also made corn pone at breakfast time which is delicious warm with cheese. (Small packages of cheese, kept sealed, that spend each night underwater keep well for a week or so.) If oatmeal is an option for you it makes a great breakfast.
Lunch: jerky, nuts, dried fruit, ... not much gluten happening here usually, because we tend to eat lunch on the go or at a portage. We sometimes have packaged dried soups for lunch on a stay-put day, choose a gluten-free one. Also the same gluten-free muffins and peanut butter, jam, or cheese as at breakfast can work well if you like a sandwich for lunch.
Dinner: pasta and rice dominate for us. Either buy gluten free pasta or have rice more often. Premix some dumpling mix to use in stew or chili (I know it sounds weird but chili with dumplings is delicious.) The meat-and-sauce part of most dinners will be gluten free if you make it yourself (dehydrate vegetables, tomato sauce etc and put it all together at the camp site.) You can also buy dehydrated potato dishes (au gratin etc) but read carefully because not all are gluten free. I've made these in a pot and they are delicious.