1. GG started when they were freshmen (even if she didn't know any of them yet, her blasts were about other kids too, not just the ones at their HS. It seems that at her age, she was looking for a way to talk shit about the rich kids in a way.)
2. GG became all about Nate,Blair,Chuck,and Serena in the last half of the year. Right around when Vanessa's life started to suck. She was about to break up with Nate and wanted a way to get back at all of them
3. She only considered Daniel as an insider
Just my thoughts. Who do you think it is?

