I guess what I mean by not off the charts is that it may not be obvious that he needs to be qualified for AIG in K-3, because he's right at the cut off.
What criteria does the school use for "the cutoff"? Requiring an FSIQ of 130 (and
not allowing GAI) seems unusually high.
So that you know, the National Association for Gifted Children has issued a
position statement about using the WISC-IV (the 6+ year old analog to the WPPSI) for gifted placement:
When the WISC-IV is used for the identification of gifted students, either the General
Ability Index (GAI), which emphasizes reasoning ability, or the Full Scale IQ Score (FSIQ),
should be acceptable for selection to gifted programs.
I don't know whether your school has shaped their policies around this statement, but if they have, it's possible that they would consider WPPSI with the same policy as the WISC. Definitely worth finding out.
One he gets to 3rd grade it's 95%, which he should easily pass, but I do think he'll really benefit from services in 1st grade so I don't want to wait that long if I can avoid it.
You probably have a good feel for this as his parent, but if you have a conversation with the teacher and/or coordinator, make sure that you frame it in a way that indicates that such a placement is in the best interest of his needs (and isn't perceived by them as "here is this test score; please place my son in your program"). I know that's probably what you are fearing by bringing up the test, but if you bring up the test in the broader context of "I think my kid has some special needs" rather than, "I've come to talk to you about this test score," it would likely be better received.

Best of luck to you!