It;;s Gossip Girl;;s unforgettable final season. The summer is over and Serena has gone missing. Blair has offered Chuck her heart, Dan has written a new book and Nate determines to reveal Gossip Girl;;s true identity. In the final shot, a new generation of wealthy Upper East Siders are seen at Constance as a new lonely boy walks past his classmates, thus the beginning of a brand new Gossip Girl.