Have you met with the principal of the public school personally? I would go in armed with your son's test scores and a copy of the booklet "Understanding Your Twice-Exceptional Student" from the 2e-newsletter.com. Explain your situation and ask them what they would suggest. If they have no way to provide an appropriate education for you DS, then your choices are to 1)pursue legal action under FAPE, 2)Meet with private school and explain situation and see if they have ideas, 3)Homeschool. I've learned on this forum, that many families with twice-exceptional children have to turn to home schooling as the best option for educating their child.