“School of Rock” star Joey Gaydos Jr. is rocking a seriously sad tune … about stealing guitars, or at least about getting busted for jacking ’em.

Joey, now 27, who played lead guitarist Zack, in Jack Black’s fictional school band, is facing felony charges in Florida for larceny and grand theft … after cops busted him 4 times in the last 5 weeks for allegedly stealing guitars and an amplifier.

According to Police, Joey is making a bad habit of walking into stores, asking to test guitars, walking out with the instrument without paying … and then unloading them at pawn shops.

Police say Joey’s string of heists began early this year … when he allegedly nabbed a blue Epiphone Prophecy Les Paul valued at $800, a black Fender Stratocaster worth $699, and a Gibson Les Paul gold top with a $1,900 price tag.

Of course, every good electric guitar needs a kickass amp … so naturally, he also got busted for stealing an amplifier.

According to Police, Joey confessed and blamed a drug problem. However, in court he entered not guilty pleas for the guitars. He’s yet to give a plea in the amp case.
Sarasota Sheriff documents indicate that Gaydos Jr is due in court again later in the month.

It is not Gaydos Jr’s first brush with the law, as he was arrested for drink-driving in 2009, when he was just 17.

His police record shows that the child star is now unemployed. According to movie database site IMDB, Gaydos Jr did not do any more acting after appearing in School of Rock.