Born in Cork, Ireland and he is a professional race driver who specializes in drifting.
He was selected for the Irish Team in 2004 but retired mid-season due to injuries.
In late 2005 Gunn's interest turned to a new sport called drifting.
At round 2 at Silverstone Niall finished 5th overall in the D1GB event and qualified as the top 8 European drivers to enter D1 Grand Prix Mechanical problems hindered his car on the Sunday.
In 2007 Gunn competed in the European Drift Championship where he had three top 8 finishes.