The Hampshire batsman made an unbeaten 153 on the first day of England's warm-up match against Australia A in Hobart.
Gooch has admitted that the 33-year-old has shown his ability ahead of the forthcoming Ashes series.
"An opportunity arose in that first game when Alastair had the stiff back, a condition he'd suffered with in the past, and Michael got a game and took his chance there," Gooch told talkSPORT.
"We wanted to see a little bit more of him in this game, and he's done his chances no harm of playing with 150. He's got a second opportunity here, a couple of innings, and he's done very well.
"You want all your players to show form, so he's put a bit of a marker down for himself."
The first Ashes Test will begin in Brisbane on November 21.