Wow- thank you very much for these answers. I'm not sure what to think. Clearly, Boston may not be a good choice for a PG-child unless one is lucky to find that special teacher?

We would prefer a school for PG children mainly for 2 reasons:
1. Meaningful school days where he will be able to learn as much as he likes (and not beeing forced to sit in on classes that cover subjects he already know).
2. Social life with (almost) same age kids whith a similar cognitive ability- kids who may understand him.

We are NOT looking for him to study more or harder than other kids- we want him to enjoy life as a kid. For this reason, I think that an ordinary G&T program may be the worst place for our son. Our son is PG but not 2e. He is likes natural sciences, math and languages.