In the first half, Gais scored three goals in just seven minutes. First Axel Norén put them in the lead, then star Julius Lindberg added a penalty before Axel Henriksson made it 3-0.
"Trelleborg started well and we started a little shaky but after maybe 15 minutes we took hold of the game," Norén told Discovery+.
In the second half, they scored three more goals and now have a great opportunity to move up to the Allsvenskan. They are second in the series, four points ahead of in-form Utsikten, who admittedly have one game less played.
The first two teams in the Superettan go straight up, while the third place qualifies.