I think that NPC wants to know not only what GPB thinks of you, but see their release figures, things like that. Especially since they are the only NPC on campus. Obviously it will help you that they do have to turn so many women away - NPC will see that there is a need for another sorority. Also NPC might want to hear from the Greeks themselves (as opposed to the admin) about campus perception of Greeks, etc.
Just be as sweet and charming as you always are on here.

They're not going to say anything catty, it would just make them look bad.
Good luck!