Josh Schwartz and Stephanie Savage are going back in time for their upcoming “Gossip Girl” spinoff. The new CW project will focus on a younger version of “Gossip Girl's” Lily van der Woodsen (Kelly Rutherford). Spinoff centers on the character as a wild teenager in 1980s Los Angeles, when she was known by her maiden name, Lily Rhodes. Spinoff will be produced as a backdoor pilot, as expected, and air May 11 as an episode of “Gossip Girl.” In the new project, which is based on an original...