In his rookie year on the Professional Golf Association Tour, Gibson finished 105th on the money list while recording three top-10 finishes. He finished 110th on the money list in 1993. He finished 109th on the money list in 1995 while recording one top-10 finish.
Gibson joined the Nationwide Tour in 1990. In 1994 he recorded two top-10 finishes while finishing 129th on the money list, four spots shy of retaining full-time status on the Tour but he went to qualifying school and earned his card for 1995. His best year on Tour came in 1996 when he finished 69th on the money list while recording two top-10 finishes.
He finished in a tie for third at the Las Vegas Invitational, his best finish on Tour in his career.
His success continued in 1997 when he finished 92nd on the money list with a top-10 finish and also finished in a tie for 28th at the United States. Open. His performance fell off in 1998, he finished 139th on the money list earning only partial status on Tour for 1999 and spent most of his time that year on the Nationwide Tour.
In his return to the Professional Golf Association Tour he only made 12 cuts out of 30 events entered so he returned to the Nationwide Tour for 2001. He split time between Tours from 2002 to 2004 and played in a limited amount of tournaments after that.
Gibson created the Kelly Gibson Foundation in 2005 to support Hurricane Katrina relief efforts.
He also created a Junior Golf Tour in 2009. Nationwide Tour wins (2) 1991 Ben Hogan Tri-Cities Open Canadian Tour wins (2).
