We've had the genetic testing done on all four of our kids and it's not really all that easy to read, sort of technical. I'm not sure if it would hold up in court either. Maybe if she did test positive for DQ2 or DQ8, then that would verify her need to avoid wheat, rye, and barley but I doubt it would prove that she has a problem with corn just because the standard definition of gluten does not include corn. Also, even if she has one or two gluten sensitivity genes, I don't think the mainstream medical community recognizes that as fact that one needs to unconditionally avoid gluten (sad, I know). In fact two of our kids (along with myself) have two gluten sensitivity genes, but not the celiac genes, so our pediatrician considers that we have “ruled-out” gluten as an issue for those two. They are gluten free anyway.
I wonder if the ELISA testing wouldn't be a better option?? Or maybe traditional IgE allergy testing from an allergist?? I do not have any experience in this type of thing, I'm only drawing from what research I've done on my own. I would be curious if anyone else has a more definitive answer for you.
I really hope you can convince him to stop hurting your daughter, that is just so sad, poor little thing. My heart goes out to you and your daughter. Good luck to you both, please keep us posted.