I do actually and my condition is a fair bit worse than just being gluten intolerant.
If you're gluten intolerant then you wouldn't get a description.
Coeliac disease is not an intolerance (for example).
Honestly I don't know much about low fibre diets so i'm not going to comment on that, but at the same time it's not a GF diet.
EDIT: And to clarify, I wouldn't be against the idea of grants for those on low incomes that have other food related medical conditions that are not easily avoided.