My son's "IQ" according to his official score at age 8 had increased by 35 points since he was initially tested in first grade. It was due to overcoming some of the challenges he faces due to dysgraphia and dyslexia. If your son's IQ is not showing up on testing, I'd recommend looking into more thorough testing to identify what his challenges are. A good psych evaluation will take into consideration the entire picture rather than the small snapshot of an IQ screening test.
Once you have a clearer picture of the entire scope of information, you'll be better able to not only decide if gifted placement will be beneficial to him but also better advocate with his teachers and school administration to help them understand his strengths and challenges as well.
