[3] He represented Scotland at the 1980 IBSF World Snooker Championship, finishing fourth in his seven-player qualifying group after winning three matches.

[1] In the 1981–82 snooker season, he reached the third qualifying round of the 1981 International Open with 5–3 wins over both Sid Hood and Maurice Parkin, before being eliminated 3–5 by John Dunning.

[1] His first match in the World Snooker Championship resulted in a deciding frame defeat, 8–9 to Donnelly in the 1981 tournament.

[6] His best performance in a ranking event was at the 1984 World Snooker Championship, where he reached the last 48,[7] where be defeated Gino Rigitano 10–7 and Mick Fisher, both 10–7, before being knocked out 3–10 by Joe Johnson.

[1] Gibson reached the final of the 1986 Scottish Professional Championship, losing 5–10 to Stephen Hendry after eliminating Eddie Sinclair and John Rea.