The 26-year-old edged out his Londonderry rival to win a place in the Ladbrokes World Darts Championship, impressing by hitting four 180s in the contest.
The pair had won through the early stages of the annual tournament at the Red Cow Moran Hotel in Dublin in August before taking to the stage at the Citywest Hotel ahead of the PartyPoker.com World Grand Prix final.
Gurney made a superb start with a maximum to open the match, but missed three darts to win the opening leg as Jackson took out 62 in two darts to lead.
Gurney levelled with a 102 finish but was again punished for missed doubles in leg three after adding a second 180, with six darts for the leg going begging. Double 12 for Gurney saw him level, with Jackson taking out 61 to lead 3-2 before the youngster hit top form to level on double eight and then hit double nine to move ahead for the first time at 4-3. He added a 180 and finished 68 to win the eighth leg, and posted his fourth maximum and an 86 checkout to seal the victory.