This appears to be a magazine article by Gary Russell with "fictional history" similar to the Doctor Who Annual 2006, and not an actual narrative. If it shouldn't be deleted, then it should at least be overhauled.
The Legacy of Gallifrey was a story published in Doctor Who Magazine. It summarised the history of Gallifrey and the Time Lords. It recounted some of the events in The Two Doctors, The Three Doctors and The Five Doctors, as well incorporating elements from other televised stories.