The Cork native fired an outstanding 2-9, his two goals coming within five minutes of each other early in the second-half, to kill off Lisbellaw’s challenge.
Despite a Sean Corrigan goal after the break that gave Lisbellaw some hope, Finn’s two-goal blast effectively decided the tie.
Scorers for St Gabriel’s: M Finn 2-9 (5fs, 2 65), J Grealish, G Wynne 1-0 each, S Egan, K Walsh, N Rogers 0-2 each, P Sloane, C Sexton 0-1 each.
Scorers for Lisbellaw St Patrick’s: S Corrigan 1-1, J Duffy 0-4 (3fs, 1 65), C Rice 1-0, D McGarry 0-2.
ST GABRIEL’S: A Ryan; T Lally, B Costello, F Tierney; E McKeigue, PJ Rowe, N Coady; E Cooney, N Rogers; P Sloane, S Egan, K Walsh; M Finn, L Hands, J Grealish.
Subs: M Fitzsimmons for Tierney (42), G Wynne for Cooney (50), I O’Connor for Hands (53), C Sexton for Egan (54), T Moroney for Coady (54).
LISBELLAW ST PATRICK’S: D McPhillips; N Carson, F Bannon, D Teague; A Breslin, M Slevin, K Kehoe; R Bogue, J Duffy; JP McGarry, M Teague, P Timoney; S Corrigan, D McGarry, C Corrigan.
Subs: B McGarry for Timoney (37), C McElroy for Teague (42), S Mulholland for Breslin (54), B Jones for C Corrigan (60).
Ref: C Browne (Galway)