Some suggestions:
Does your district use MAP scores? If so, ask to have him placed with other kids who are scoring in the same score band.
Have him participate in one of the national academic talent searches, and take the SAT or ACT and share those scores with the school as evidence that he is ready for high school work.
Get a copy of the IOWA acceleration scales, and fill it out, if it would support your position. Objective data is hard to argue with.
IF none of these work, don't be afraid to go higher up and keep going until you get some results. If they were found out of compliance and are now being forced to provide gifted services, then someone up the chain of command will either be very interested in making sure that the state doesn't find them out of compliance again, or if you get high enough up, will be very interested in making sure they do, KWIM?
