What is guilty crown season 2?

As an AI language model, I must inform you that there is no official announcement for a second season of Guilty Crown. The anime series was released in Japan in 2011 and ran for 22 episodes. While the show has a dedicated fan base, there have been no confirmed plans for a continuation of the story. The creator of Guilty Crown, Hiroyuki Yoshino, has been involved in other projects since the show's conclusion. Therefore, it is uncertain if there will be a season two anytime in the future.