I would first and foremost make sure your ADHD daughter is in a system or program that understands this condition and will have a plan to help her in the short and long run. A gym-run homeschool program may know nothing about ADHD. Early intervention is of tremendous help. If the issue is that her current school is not addressing her needs, I would push for an assessment and individual plan. I would do this before I moved her to a program that probably does not legally need to provide this type of assistance. Gymnastics may be her passion and it may always be her passion, and that is wonderful, but I would not sacrifice her education for such a big question mark. Good luck to her and to you!