Thanks to Felicity Gustafson for her great Gumby One Shot review at ComicsBulletin.com.

She gave it five bullets!!
Some of her comments:

The artwork? well, this is going to sound really strange, but the art looks just like a big coloring book. I was getting subliminal messages to grab a pack of crayons the whole time I was reading this. I may print out a few pages and do just that. It’s all bold lines without any shading or a lot of detail. In a way, the art echoes Gumby; it’s just clean and simple. It’s very clearly drawn without the frills because it doesn’t really need it. Considering the wide array of things drawn, I feel the need to bow to the skills of Santillan. There were some really random things that needed penciled in that he managed to draw flawlessly. The art style didn’t waver in the slightest. The overall effect would have been better in color, but the black and white scheme didn’t detract from the enjoyment of the book.

Gumby One Shot:
Writer: Chris Reilly
Pencils: Jorge Santillan
Inks: Gabriel Cardoni
Color: ?