The answer to your general gifted questions are best answered with another series of questions:

What was the purpose of testing? How is he doing in school?

The GAI is 139. It should only be reported when >7 points above the FSIQ, which it isn't in this case.

The scores are very close to my DS' scores at the same age. Our result, together with achievement testing, was for a drastic math acceleration and a grade skip.