While that’s not really confirmation of anything (Scott Gimple has to remain tight-lipped about many of these topics), it is worth noting that he does not explicitly rule out the chance of a movie set in the world of The Walking Dead.
The series has technically already aired on the big screen before, but this seems like a suggestion that it could go one step further for a full-fledged feature adaptation of the undead universe.
With so many different forms of content being created in that world as its popularity persists, it stands out as one of the many “possibilities” that the people working on the series seem willing to explore if it continues to expand and evolve.