Gary Wallis is perhaps best known as the percussionist for Pink Floyd in the post-Waters era for both their live and recorded performances.He has worked with a wide range of artists and bands, including Nik Kershaw, Pink Floyd, 10cc, Il Divo, Westlife, Girls Aloud, Atomic Kitten, Paul Carrack, Dusty Springfield, Bonnie Tyler, Mike Rutherford, Mike + The Mechanics, Tom Jones, Jean Michel Jarre, Helene Fischer and Schiller.
As a young drummer/percussionist, Gary Wallis worked with a number of prominent British bands. From 1982 to 1984, he was the drummer for The Truth, working alongside Chris Skornia (Hammond organ/keyboards); Dennis Greaves (guitar); Mick Lister (guitar) and Brian Bethell (bass).
After leaving The Truth, Wallis went on to perform as a percussionist with Style Council (1984–1985). He was invited by David Bowie to perform as a percussionist at the Live Aid concert at JFK Stadium, Philadelphia, 13 July 1985, with Robert Palmer and Power Station, as well as Duran Duran.
In the mid to late eighties, Wallis was drummer for The Krew, the backing band for Nik Kershaw (Riddle and Radio Musicola tours) and Chris Farlowe (1988). It was at a Kershaw concert where his energetic playing and elaborate percussion set-up drew the attention of key Pink Floyd musicians to Gary Wallis.