Depending on how soon you are moving, it might still be worthwhile to take the IQ test, as that is likely to be more accurate than either the SAGES-2 or the CogAT. OTOH, it doesn't matter very much at this age, as long as he has access to the appropriate services. And there is something to be said for waiting a year or two, or longer, before having him sit for a comprehensive IQ test, as he will be better acclimated to USA educational expectations by then.
Hope it works out for your family one way or the other.
