I understand the points everyone is making but this is Kubo and Bleach we are talking about so until I have absolute confirmation Gin is dead I will keep him as a possiblity. We never did see his second form and he did say he was a snake. Maybe he just shed his skin like a snake.
Also, in this translation Gin says "leave it to you and hit the trail"
http://www.mangapanda.com/94-56926-1...apter-417.html