What to do? The odds are that DS will never be in this situation, but....
Let's be grateful for that - it's up to you. I wouldn't give a book about gifted, I think it is rude. Sort of like asking a girl out on a date and then taking her to the hairdresser to change her haircolor, yeah?
Your brother might be a better choice, but what would the ramifications of changing that now be? Perhaps not worth it?
Also have to wonder if that particular branch of the family is gifted but some 2E issues are lurking and making them seem bad at school?
Smiles,
Grinity