Margaret is similar in her sensitivity. She'll get that hard "colic belly" tight itchy skin she has trouble making it too the bathroom in time (though not as bad anymore) and over time just issues with vomiting in general. We briefly tried reintroducing gluten after being off for over a year. She actually went two weeks with no reaction and we thought Ohh good maybe she has outgrown this. Nope when it came back it was full force.
.. She is also dairy free with similar issues. (obvious dairy if its like the 37 thing on an ingredient list we usually let it go)
She does sometimes complain especially because the rest of us are not GF. We are lucky that she not extremely sensitive so we dont overly worry about small cross contaminations and dont HAVE to have a total GF home. However she does when exposed enough to react have bad enough reactions that is keeps her from actually "insisting" on breaking her diet restrictions.
I wont buy what we know makes her sick. However I do compromise in other areas. We tried different types of breads before finding ones she likes. They are simple "white" breads with no redeeming nutritional value but ehh they are also safe I let the rest go. I keep a bag of her approved and safe Chicken nuggets (the sliver platter GF honey nuggets with the pooh bear on the front), and sometimes corn dogs on hand. Again not exactly the picture of health but for her still a safer choice and her "special" go to foods when she having to pass on the rest of the family dinner of gluten pizza or Lasagna (BTW I know can be made GF but she hates sauces anyways). Her overall food choices are whole foods meats DF yogurts Fruits and veggies nut butters etc a few compromises helps keep the peace.