Jack Taylor's team followed their eight-wicket semi-final defeat of Sussex with another superbly professional performance against their west country rivals, who were strong favourites after beating Surrey in the other semi-final but were soundly beaten in the decider with 30 balls to spare.
Openers Miles Hammond (58 not out) and Cameron Bancroft (53) put on 112 for the first wicket as Gloucestershire chased a modest target of 125 on a slow pitch that had yielded runs at a miserly rate for most of the day.
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Matt Taylor (3-19) and David Payne (3-27), who have shared 61 Blast wickets this season, were again Gloucestershire's biggest weapons with the ball as they showed themselves masters of the conditions, the county lifting their first silverware for nine years.
Taylor snared his three in the powerplay, Payne inflicting damage at the end of the innings. Only Somerset skipper Lewis Gregory's 53 off 37 balls kept Somerset in the game as they were bowled out for 124 in 19.4 overs.
"I think we probably won it with the ball in that first half of the match," Payne, who finished the campaign as the Blast's leading wicket-taker with 33 wickets, said.
"It was a pretty good effort by the bowling pack to keep them to 120-odd, although we didn't think we would chase it down as well as we did. It was pretty clinical in the end.
"We snuck in through the back door really with a few things going our way but you feel that when you get into the knock-outs it is anyone's to win and there was a real belief and confidence in the side that we could do it."
Cameron Bancroft, that is a sensational catch! 🦸�♂�— Vitality Blast (@VitalityBlast) Gloucestershire are flying in the final pic.twitter.com/xL4dbEjlAqSeptember 14, 2024
Gloucestershire were the outsiders on the day, having qualified for the knock-out stages only on net run-rate after winning their last two South Group games, before upsetting Birmingham Bears on this ground in the quarter-finals.
Their last trophy success came in 2015 in the One-Day Cup, which Somerset will hope to win in next weekend's decider against Glamorgan after seeing their hopes of landing a treble come to an end.
"Hats off to them, they bowled brilliantly and we just couldn't get going," Gregory told Sky Sports.
"Had we got to 150 we'd have had a sniff but it was always going to be a challenge with the ball.
"We've got a great bunch of lads in the dressing room but it's a tough one to take tonight."
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