I would not myself object to putting the cruxifixion part in the Basilides article so long as it goes somewhere  However I think that the current arrangement concurrs better with the conclusions of Lohr which in my understanding my German not being that good is that the Exegetica is by Basilides and Isadore his son and is a commentary on the gospels of Matthew and Luke while the Gospel of Basilides as known by Origen is a distinct midsecond century work not by Basilides or Isadore but which circulated amongst the Basilideans from the latter second century onwards  So three articles  Basilides Gospel of Basilides and Basilideans  all highly speculative in content  My own view is that  envisaging a newcomer to all these matters  a text narrating the crucifixion of Jesus is quite properly categorised as a Gospel