This is an unusual cartoon short because it's actually a spin off of the full-length Fleischer Brothers film, "Gulliver's Travels". Following this 1939 film, the studio decided to make a few Gabby shorts. Interestingly, the voice for Gabby is Pinto Colvig—the same guy who voiced Goofy and Bluto. And, the King was voiced by Jack Mercer—the same guy who voiced Popeye.
The King and his staff are doing some spring cleaning at the palace. Know-it-all Gabby insists he could do it better and so the King tells him to supervise the cleaning. However, Gabby turns out to be a complete disaster and seems to do everything he can to make things worse. Eventually, the King has had enough and decides to 'let him have it'.
The best thing about this cartoon, by far, is the animation. Oddly, I thought the animation looked BETTER than "Gulliver's Travels". Gulliver was in color but lacked the wonderful drawings and backgrounds you see in the Gabby films. However, despite being a decent cartoon, the character of Gabby was a bit annoying about 7 minutes of this jerk was about all I could take. So I do understand why they only made a few Gabby cartoons.
UPDATE: I saw a few more Gabby cartoons since and really, really have grown to hate the little squirt! He ALWAYS is a Mr. Know-it-all and is so obnoxious!