George Douglas Gimarc (/ɡəˈmɑːrk/ ghə-MARK; born 1957) is an American disc jockey, record and radio program producer and author based in Texas and is in the Texas Radio Hall of Fame. He is known for his extensive and authoritative knowledge about the classic rock radio format, recorded music in general, and specifically the era of punk rock. His broadcast programs have been heard in various formats in the US, Canada, Europe and New Zealand, via licensed stations and unlicensed pirate radio transmitters.