What specifically does he do that's disruptive? And does he do it only when he's bored, or all the time?

He sounds GT, but it is possible to be both GT and have behavioral problems, so details might help. I think Grinity is right on the mark about testing, too. Assuming he's not endangering people with his behavioral issues (at which point, they may not have a lot of choice in the matter), then it seems to me that the school has a duty to try to change the behavior before they boot him out!

Kriston