I agree with DeeDee. I think that as a 10 year old he needs a higher level of adult contact. I would ask them to carefully define what level of support they are willing to give him -- meeting with the gt teacher or regular teacher how often? how are they evaluating his independent work? who does he go to if he gets "stuck" while working independently at school? What are they offering him that makes you want to send him to school more?
Both DH and I were sent off "to the library" to fend for ourselves during the latter part of elementary school. He responded by getting his work done in a few minutes and then tormenting the librarian. I liked it at first but then felt isolated and that the adults had given up on teaching me.