McKay scored a brilliant goal from 25 yards in the Scottish Cup semi-final tie between Rangers and Celtic at Hampden Park in Glasgow on Sunday afternoon.
The goal came in the sixth minute of extra time, which ended 2-2, leading to a penalty shootout that the Gers won 5-4.
Scotland international goalkeeper Gordon has suggested that winger McKay, who is just 21 years of age and has been an important player for Rangers this season, got lucky with his strike.
"The throw-in has gone the wrong way,” the former Sunderland goalkeeper told The Scottish Sun. “Three players are in front of the referee and he has got involved in something else.
"We should have defended better, but it was a one-hit wonder. He could hit it another 100 times and not hit it as well.”
Celtic were favourites heading into the match, but Rangers were the better team on the day and deserved to win.
The Gers have already won the Scottish Championship title this campaign and will play in the Scottish Premiership next season.
Mark Warburton’s side will compete the treble if they win the Scottish Cup this season, as they have also clinched the Scottish Challenge Cup.