Story highlights Gary Glitter, real name Paul Gadd, was convicted on six child sex abuse charges

The former glam rocker has been prosecuted previously on sex charges

London (CNN) British former pop star Gary Glitter has been found guilty of child sex abuse for crimes he committed more than three decades ago.

The 70-year-old Glitter, whose real name is Paul Gadd, was convicted Thursday of one count of attempted rape of a girl under the age of 13, one count of having sex with a girl under the age of 13, and four counts of indecent assault against girls, two aged under 13 and two aged under 16.

The six offenses were committed against three victims between 1975 and 1980. Glitter is due to be sentenced on February 27.

Glitter was known as a "glam rocker" in the 1970s for his flamboyant clothes and performing style. He sold 18 million records with hits like "I'm the Leader of the Gang," "I Love You Love Me Love" and "Rock 'n' Roll."

Detective Chief Inspector Michael Orchard of London's Metropolitan Police praised the courage of the victims in coming forward to police, years after the crimes were committed, in a statement after the verdict.