Our versatile defender/striker headed home a vital winner against Georgia just four minutes from time on Saturday.
The goal put Ireland back in the hunt in Group 10. "Gary has scored goals for all the teams he has played for," said Kerr.
"I reminded him in the dressing room before the game that he scored a couple of goals against Georgia in the finals of the European Youth Championships in 1999.
"He had forgotten about that, but I hadn't, and I told him it would be nice to add a goal against their senior team. Gary deserved it because he worked very hard and was a good foil for Damien (Duff).
"It was an excellent performance, very disciplined and well structured, and overall I think we had the edge on them and deserved our victory."
Brian Kerr was full of praise after goal hero Gary Doherty put the Republic of Ireland's Euro 2004 qualifying campaign back on track.