The Galway Masters (over 40s) will face Cavan in the All-Ireland final at the Sligo Institute of Technology grounds on Saturday (2pm).
Cavan and Galway met previously in the group stages and finished level, ensuring Saturday's final promises to be a tight encounter.
The Galway Master footballers advanced to the final after overoming neighbours Mayo by 1-08 to 0-9. The game's only goal came in the first minute from former Salthill-Knocknacarra and NUIG star Conor McGauren.
First-half points from David Cronin, James Reilly, Tom Corbett and McGauren again had Galway 1-4 to 0 -5 ahead at the interval.
Mayo levelled matters going into the last 10 minutes, but Kieran Kelly replied to edge Galway in front.
Galway finished as worthy winners following a super score that began in their own full-back line and was finished when Declan Byrne set up Brian Walsh who punched the insurance score.
Galway are captained this year by Seamus O’Ráinne.