In a health food store or the health food section you will be able to find
gluten free noodles, pastry dough, cake mixes, breads, and sauces. My advice is to switch to rice instead of pasta (if it uses pasta, try rice and see how it turns out) and salads instead of breads. (In my experience, Gf breads are very very crumbly and never as nice.) If it uses a crust, try mashed potato instead. So instead of a pot pie, have a shephard's pie with mashed potato on top instead of a pastry crust.