Hopes of an upturn in fortunes after last week's narrow defeat in Paris were wiped out as Ireland cruised to a 40-13 win.
Gordon said: "We committed rugby suicide out there. The fans came full of expectation after our efforts in Paris and we let them and ourselves down badly. We are sorry.
"Words can't describe how the guys feel in the dressing room because we know it was mistakes that cost us. We played so well for the first 25 minutes and one daft mistake let Ireland back into the game. Then they blew us away."
One of the few bright spots in the afternoon was Glasgow skipper Jon Petrie's third try for Scotland but it was little consolation aftre such a poor display from the team.