My experience with 15 year olds is that they just want to control their own lives. And they are trying to deal with all the emotional and maturational stuff that goes with being teens - whether gifted or not.
The hardest part of being a parent, IMHO, is realizing that you can't control your child. You can guide, you can encourage, you can support, you can provide opportunities. But you can't control. It sounds like there is a problem -have you asked him what's going on? Did he want the skip and the IB program? Why not let him go to college and major in gaming production? Does he need the IB program to get there? I'm not real up on that end - my gifted kiddo right now is only 7. But I have a GT kid who wasn't recognized as such who is now 29 years old. He was pretty apathetic about school - but not accelerated like your son. Probably should have been, but wasn't. He's a die-hard gamer even now. Lived for RPG and video games through middle and high school. Runs a LAN group now. The gaming isn't all that bad - the question is whether it's a way to avoid reality or not.
I'd say ask your son what is going on and then sit back and really listen. Offer him a chance to go counseling if he wants to. Offer him a link to Haven:
http://www.havensrefuge.lunarpages.net/Offer support, opportunities and encouragement. Be sure he knows you love him for just being him - not because of success in IB or being smart. Be sure he knows what different choices he has and what the consequences might be. And then let him make the choices he wants.
