Let’s take a minute to think about it rationally though. If you’ve seen any shots of the wedding, it looks like it was a lot of work — and a lot of money. Dan (Penn Badgley) and Serena (Blake Lively)’s wedding, however, seems quick and dirty enough that it could be a staged event.
So, does that mean it’s definite they get married? No. It’s a distinct possibility that it could be a dream sequence... or that GG showrunners just decided to blow some dough on an expensive practical joke.