Venice police posted security camera footage from inside Troll Music on February 7, showing a man believed to be Gaydos casually strumming a guitar inside the store before walking out with it.
Florida authorities confirmed to TMZ that Gaydos, who played Zack in the film's fictional band, is facing felony charges in Florida for larceny and grand theft.
Most of us know Joey Gaydos Jr for his role as a bashful young guitarist in School Of Rock.
It's been reported that actor Joey Gaydos Jr would walk into the stores and ask to test the equipment, prior to walking out with the merchandise without paying a dime.
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Sadly, it was claimed that he attempted to sell the stolen guitars in pawn shops to make money to fuel an alleged drug habit.
Joey has stolen a blue Les Paul Epiphone Prophecy priced at $800, a black Fender Stratocaster priced at $699, and a Gibson Les Paul gold top priced at $1,900.
In 2003, a guitar-wielding Gaydos starred alongside leading man (and Tenacious D musician) Black in the Richard Linklater-directed School of Rock.
The site adds that he has plead not guilty to the guitar thefts, but has not yet entered a plea regarding the theft of an amp.