Will you be on a 2 meal a day plan or 3? If you are on a 2 meal a day plan and you can keep a mini fridge in your room then you can always have yogurt, gluten-free cereal, peanut butter, etc. You can make at least one meal on your own.
I didn't check it for being gluten free, but I am using Ban deodorant (green container). I bought it in Sept. and it is now Feb. and I am still on the same container! It lasts forever. So budget-wise, if you are looking for something that isn't too expensive and lasts a long time, I recommend that!
There are a lot of recipes online for eggs cooked in muffin tins. They are mixed with vegetables and other goodies. If you have time on Sunday you could make up a dozen or so of those then keep them in the fridge to warm up on busy weekday mornings.