Well, this is a surprise:

It's technically a remake, since there have been a few attempts to film the story, but otherwise it's not exactly something you'd expect today's ADD anything-before-1990-is-retro execs to greenlight. A movie based on a brilliant piece of 18th century social satire? Can't quite imagine the pitch on that one. It's entirely possible the movie was sold on the basis of the image you see on the poster. Jack Black! Tied down by little people! It'll be hilarious! Imagine the flatulence jokes! Imagine entire plotlines built around giant flatulence!

The imdb synop says:

Hmm. Gulliver was a doctor. The cast list suggests the entire movie takes place in "Liliput" - the other three journeys apparently left for sequels. (In the fourth book Gulliver goes to a land run by super-smart horses, and the brutish humans are known as . . . "Yahoos." That's where the word comes from. Hey, could be good. Then again, one of the credits on the imdb page says:

Justin Brett … Paul Stanley of "Kiss"

It's almost worth the ticket to see how they work him into the plot.