BarkMyer on the SP board, uploaded a recent phone interview with SP where he also answered some fans' questions regarding GG. Here's a transcript of the part about a possible reunion movie:
"Well, I've been contacted by a number of sources. I can't reveal too many and I don't want to start any rumors, but they asked me if I would be interested in doing a reunion movie and I said you know, look, Amy Sherman Palladino's writing it, I'd do the phone book for her, so."