It is not impossible that his VCI, which is consistently mid 120s, might drift up into the 130 range on a retest, but I would strongly caution against retesting with the WISC-V at this time, as a third test within three years is highly likely to result in score inflation due to retest effects, which, while it might increase your likelihood of a qualifying score, would be hazardously close to cheating. Although your school allows annual retesting, it would be better practice to wait 24 months between retests using the same instrument. Besides, the chances of the score coming out lower can be similar to, or even higher than, those of it rising (score inflation effects aside), as you can see illustrated in your existing two sets of test scores.
This does not mean that he is not very bright, especially in the language area, or that he does not require some level of additional support, in the sense of greater academic challenge. We draw arbitrary lines separating "gifted" from "bright but not gifted", but the reality is, of course, not nearly so articulated.
TBH, I also wouldn't expect too much from a once a week pullout enrichment program. And nothing stops him from joining his two best friends as they continue discussions started in class.
