I would see if you can talk to the GT director/coordinator (whoever is in charge) and see if he can be admitted on a trial basis.
Is he unhappy in the classroom or have any trouble? If not I wouldn't stress about it. Some kids under perform the first time they take a test like that, since it's so different than anything they've been presented with before.
I'd also point out to the gifted coordinator that the VIX *is* above the 130 cutoff, so he may very well need the gifted services, at least in the verbal domain. The lower NIX does nothing to change the fact that he is gifted verbally.
I do notice that there is a standard deviation of difference between that VIX score and the NIX - any indication ever of problems with vision or visual processing? If there is a disability or impairment that is depressing his non-verbal score, that certainly shouldn't be counted against him.
