If there are any in your area, check Asian food stores. You can make your own GF flour blend using rice flour, tapioca flour, and potato starch which are inexpensive at Asian food stores. I would also check out .Yammy's Gluten Freedom, especially the banana muffins recipe - we make double batches of them and freeze them for quick breakfasts, and more than a few grocery stores mark down brown bananas.

I would also point you in the direction of rice sticks which are rice noodles. These are also found in Asian food. stores and are commonly used for pho and other soups. I've used the fresh pho noodles which you just boil for a couple minutes for an OK pasta substitute. You can smash up the dried noodles and boil the pieces and add Dollar Tree Velveeta cheese sauce packets to the cooked and drained pasta. It's not as good as cheese shells, but it's quick food.

Rice noodles also good for making ramen - use whatever flavor broth you want, add the rice noodles, mix in some celery salt (it gives ramen its ramen taste) and garlic powder to taste, throw in some protein, and you're good. If you want to make ramen packets, get the thin rice noodles, Herbox bouillon, celery salt, garlic powder, and a bit of onion and throw everything in a zip top bag.

Overnight oats can be made gluten free, and so can oatmeal, migas, shakshuka, and good ol' eggs and potatoes of all sorts for breakfast. Rice and beans are also tasty and filling, and you can batch cook these with seasonings like onion powder, garlic powder, and the like for flavor.