I absolutely love Gumby. Art Clokey was an outstanding storyteller, although the movie isn't quite as good as the show in that respect. To be fair, he wasn't used to writing feature films, and he was older at the time. It's still very entertaining and nostalgic, but if you're looking for golden age Gumby content, I would definitely recommend the 1950s and 1960s Gumby.
I only watched the first two episodes, so keep that in mind when looking at my ratings. Would I continue watching? Probably not. It's just not that intriguing. What I do like about it is that it has post-apocalyptic people putting on a play and lighting candles, which is different that what you might usually think of.