<Tr> <Td> ← Previous "Father and the Bride" </Td> <Td> Next → "The Backup Dan" </Td> </Tr> <Tr> <Td_colspan="2"> List of Gossip Girl episodes </Td> </Tr> <P> "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 (The CW) in the United States on January 30, 2012 . In the episode, the wedding of Blair Waldorf (Leighton Meester) to Prince Louis Grimaldi (Hugo Becker) takes place . </P> <P> The episode opened to favorable reviews, with television critics praising the fact it honored the series' successful days . Michelle Trachtenberg's performance as Georgina Sparks was also well received . Upon its initial airing, the episode was viewed by 1.39 million Americans and garnered a 0.7 / 2 Nielsen rating / share in the 18--49 demographic . The total viewership and ratings for this episode were slightly up in comparison to the previous episode "Father and the Bride". </P>

When does blair get married to the prince