My son was/is advanced - advanced intellectuually (not reading, but in understanding and grasp of things - Shakespeare, Einstein and things like that). We had the whole thing with bullying by pupils AND STAFF, and we waited far too long. We finally took him out of the school at age 9 (he has 2 more years before high school)
The school had no intention of helping him, he was just a bother, and besides there were loads of other kids to be attended to. Do not let this happen to your little one! If the school can't cater for them, their uniqueness, then it is not a place to put your precious child. Take them out NOW.

We have had to put our son in a private school, and it costs an arm and a leg, and it is against all my principles but at last he is making progress, he is catered for and we have, at last, some peace in our lives.