G.G. (Gossip Girl)
"G.G." is the thirteenth episode of the fifth season of the American television teen drama, Gossip Girl and the show's 100th episode overall. The episode was written by executive producer Joshua Safran and directed by Mark Piznarski. It premiered on The CW Television Network in the United States on January 30, 2012. In the episode, the wedding of Blair Waldorf to Prince Louis Grimaldi takes place.