Yeah, it's brilliant!
I actually just went on a GG fansite and had this thrown in my face:
[spoil]Serena gets arrested towards the end of the season, the person who turns her in is a shocking surprise[/spoil]
I know!
It feels weird it's finishing soon because it's even longer without new episodes. Plus when it returns, they'll be going to college so it's going to be so much different. I'm still confused as to how it'll all work when they're at different schools! :/