User blog comment:Godisme/The Shooting Star Project (Zero Mix)/@comment-4006918-20121201223441/@comment-4957813-20121201225130

http://bleachasylum.com/showthread.php/19747-Gotei-13-Omakes-for-the-3-week-break/page48?p=2909852&viewfull=1#post2909852 In this forum, the translation reveals that, in the final arc, when asked if Kubo will have any previous character appear as a friend, he said that "Grimmjow might become a friend." So Grimmjow is alive, otherwise he couldn't have become a friend