I'd really convert the house to being completely gluten free until your daughter is feeling better and you can handle both gluten-free and gluten in your house and that includes training the rest of the family. Yes, your family may balk, but wouldn't they all come together if you were dealing with cancer?
It's easy to keep gluten out of the house. Use corn tortillas instead of flour. Whip up batches of fresh popcorn, eat potato and corn chips, fruit, veggies, etc. Make gluten-free cookies and other treats and even your gluten-eating kids won't be able to tell the difference. Send them off with pre-packaged cereal bars, etc. in their lunches.
Treat them with gluten outside of the house. I often stop after school for Beans, Rice and Cheese burrito for my daughter or the donut shop for a special treat. Again, get the gluten out of your house, at least for a while.
I do have some gluten in the house, but I only have one kid and she's trained to wash her hands immediately when she gets home and we never allow gluten in our car. She eats some pre-packaged gluten things in her lunch, but I'm the one to control the cooking of noodles, etc. and the clean-up.
Sounds crazy for all these precautions, but both my husband and I are gluten free. I fractured my back this past summer doing nothing!!! So, celiac disease is serious! I only had anemia as my main symptom, who would have dreamed I was doing so much damage to my body and not know it? So, I have to be careful about glutenings. I do not want any more fractures! And I don't want to develop any more autoimmune disorders either!
It is a learning process and it will take time, but it does get easier!
Best of luck!