Gardner has been working professionally in the music industry since the age of 17. He's performed with various bands, including as a drummer with the hit English group ABC and as keyboardist with the hit Norwegian group A-HA! Hundreds of his songs have been recorded worldwide on Grammy and AMA award-winning and Grammy and AMA nominated albums, totaling over 100 million with 27 Billboard charting records.
As a Producer he's recorded over 350 songs (including 11 Billboard charting singles) for major labels such as Universal, Hollywood, Sony, CBS, A&M, MCA, Chrysalis, Virgin, Interscope, Dreamworks, Capitol, E.M.I., Warner Brothers, Polygram and Motown. Gardner was also the number 2 songwriter in 1988 according to Billboard magazine with 6 Billboard charting singles.
He has written 27 soundtracks for films including: Days of Thunder, Coming to America, and Crossroads. He's written music for Tina Turner, Madonna, Amy Grant and hundreds more.