No, this is not that Alex Gonzalez that blew the 2003 season for the Cubs. This Alex Gonzalez was on the Marlins that day and actually went to the World Series. He hit a walk off in the 12th inning of gamer four to help the Marlins to the World Championship.
This picture was taken this season when the Blue Jays were in town. Alex was one of the league leaders in home runs at the time, and added to that total against the Sox. The picture of the card shows Alex admiring one of those shots.