The talented youngster was left out of the squad to face Watford last weekend.
The 20-year-old missed the Villans' most recent clash - against Watford - after Garde appeared to take exception to the youngster's decision to go on a night out hours after the club had been thrashed 4-0 by Everton. The Frenchman had ordered Grealish to train with the under-21s (as reported by the Telegraph).
However, Garde is now hoping that the creative midfielder can prove to be Villa's saviour as they find themselves cut adrift at the bottom of the Premier League table.
Saturday's defeat to the Hornets has left the club five points behind nearest rivals Newcastle United and Bournemouth, and more worryingly, seven points off Sunderland, who are the team immediately above the bottom three.
While Grealish has struggled to make an impact this season, he has proved in the past that he has the quality to make something special happen out of relatively nothing.
And with no win in the league since the opening day of the campaign, Villa will be desperate for Grealish to create that magic moment at St Mary's this weekend.