Aufilia,
I'm on my phone so I'll have to be brief. The CoGat isn't the best test for the gifted. It's a blunt instrument often used because it's cheap. I will try to find an article for you.
My DYS ds scored a 97% on the CoGat on verbal, an area of strength for him. On the Wisc IV he ceilinged the verbal subtests.
I think it's fine to use CoGat to identify a large group of kids but the cutoff should be much lower and the gifted team should understand the limitations of their tool.
One thing you could do is ask the school you're entering to administer IQ testing--which test would depend on which private test he had and how long ago it was administered.
Welcome to the boards!
Last edited by KADmom; 03/05/14 04:42 AM.