Benjamin (Michael Angarano, Sean Hayes’s son on “Will & Grace”), home-schooled by his eccentric mother (Jennifer Coolidge), is a loner whose passion for writing leads him on an journey as his story first gets ripped off by the legendary fantasy novelist, Ronald Chevalier (Jermaine Clement) and then is adapted into a disastrous movie by the small town’s most prolific homespun filmmaker. The movie “Gentlemen Broncos” is directed by the man who brought us the equally as bizarre “Nacho Libre.”