The team tweeted the news 90 minutes before the game.
Michigan coach Brady Hoke has been coy all week over who would start under center: Gardner, who performed well in the Wolverines' 35-13 win at Minnesota Nov. 3, or the injured Denard Robinson.
Gardner was 12-for-18 for 234 yards, two touchdowns and an interception in the victory.
Hoke's decision to go with Gardner but keep Robinson active shows his willingness to give Gardner a chance to keep Robinson resting for another week. They'll use him if necessary, but Gardner will get the nod against the Wildcats.
Gardner was originally a quarterback at Michigan, but requested a switch to wide receiver this season. His ability to keep Michigan's offense from falling apart without Robinson could be the element that saves the Wolverines (6-3, 4-1 Big 10) season.
Kickoff is scheduled for noon ET on Saturday.