Gundam 00P is a side story to Gundam 00 that was serialized in Dengeki Hobby Magazine. It takes place before the events of Gundam 00, so the characters are different. The story is essentially a light novel series. Light novels are written novels that feature manga/anime-style illustrations. Some of the yaoi stuff I've posted here (such as the art in the You Takashina post) come from novels like these.
