Is there a Trader Joe's near her? They have a list online of the GF foods they carry. Also, if there is a Sprouts Market or Whole Foods, both have selections of GF foods throughout the stores.
Have her look at GF websites like celiac.com.
I'm going to post a bunch of old posts I've saved from older members who aren't on these boards anymore, sorry to say. But several had great suggestions on foods:
This on is from CherriL - Go into your local grocery store this weekend. Take a look around the produce section - but ignore all that processed, packaged impulse buy crap they have around. All those fruits - apples, oranges, pears, bananas, mangos, peaches, pinapple, coconut, grapes, papaya, avocado, melons, etc. - all safe. All those veggies - spinach, carrots, turnips, greens, cauliflower, zucchini, sweet peppers, sugar peas, onions, tomatoes, garlic, winter squash, potatoes, yams, cabbage, lettuce, etc. - all safe. Right there you can make some rather tasty dishes (tomato sauce served over spaghetti squash, vegetable stew, carrot soup, stir-fries, marinated grilled vegetables, oven fries, fruit salads, smoothies, etc.) and you haven't even left the produce department.
Head over to the meat section, and all the plain meats you want are safe. (There are legal requirements to list additives to meats - so read the labels, of course.) Get some beans, lentils, rice, corn tortillas and the like, and you can make almost anything.
There are - as you've seen - specialty places where you can get buckwheat, rice, corn, potato, or quinoa based pastas and breads. These stores may also carry part of the wide variety of gluten-free flours you can use to make your own baked goods - like pies, muffins, breads, and pancakes.
You might look at this and realize here what the key is - you have to cook. You can find specialty stores in various parts of your state, on order online a lot of other stuff if you want, or you can do your own cooking for less money.

It doesn't have to take a long time, once you get the hang of it. [br>[br>