FOUR goals from Danny Kirby killed this match in Ballinrobe, where the students were totally outclassed by Mayo.
The game was effectively over as a contest by the interval as Mayo led by 4-6 to 0-4, Kirby hitting three goals in a blinding four-minute spell.
Mayo manager James Horan had indicated he would be looking at some of the younger talent and two teenagers were handed their inter-county stripes with Conor O'Shea -- the youngest of the three O'Shea brothers -- making his debut. Ballina's Evan Regan also made his senior debut.
Both contributed early points from play as Mayo hit the ground running, easing into a five-point lead.
Patrick Sweeney got GMIT off the mark with a pointed free on 10 minutes but the story of the half belonged to 19-year-old Kirby who nailed four goals, three in the space of three minutes.
The tempo of the game decreased dramatically in the second half.
Johnny Ryan hit some good frees for the students, who never threw in the towel, but it was clear Mayo had taken their foot off the pedal.
Mayo now meet Roscommon with a place in the Connacht FBD League final already guaranteed.
SCORERS -- Mayo: D Kirby 4-1, C Mortimer 0-6 (4f), C O'Shea, P Gardiner, D Coen, E Regan 0-1 each. GMIT: J Ryan 0-5 (4f), A Walsh 0-2 (If), P Sweeney, C Sweeney, E Ward, D Cronin 0-1 each.
MAYO -- D Clarke; E O'Reilly, G Cafferkey, M Walsh; P Gardiner, K Higgins, L Keegan; B Moran, P Harte; C O'Shea, D Coen, K McLoughlin; E Regan, D Kirby, C Mortimer. Subs: J Gibbons for P Harte (h-t), A Feeney for O'Reilly (36), S O'Shea for O'Shea (53).
GMIT -- B Walsh; M Kelly, A Tierney, D Lee; C Sweeney, J Duane, J McLaughlin; A Walsh, S Boyle; D Durkan, J Ryan, N Prenty; D Cronin, P Sweeney, N Farragher. Subs: D McIntyre for Farragher (39), B Sheridan for Kelly (39), E Ward for Cronin (50), D Clabby for Boyle (58).
REF -- T J Keavney (Sligo).