User blog comment:Rij lee/Gold Roger's Power/@comment-3569609-20120114234044/@comment-3119203-20120114234414

In my memory, Garp yelled at Luffy for eating the Gomu Gomu no Mi, so he probably doesn't support the idea of haven't DFs. My guess would be that he doesn't have one, but, like you said, we cannot be sure.