The reigning Ligue 1 champions have endured a difficult start to the new campaign, winning just one of their six matches before yesterday's trip to the Stade Marcel Picot.
Girard believes that the win will give everybody at the club a lift, but said that the squad must now focus on the Champions League encounter with Bundesliga side Schalke.
"Beforehand we have struggled to get into matches, it's a bit better now," said Girard. "We didn't concede and we scored twice. That will be good for the lads. It's like a breath of fresh air.
"The three points will do everyone good. There will be no hangovers on Sunday but it is good, it's been a while since we have heard a cry of victory, it is good for morale.
"We have a difficult game at Schalke next. We know it will be hard but it is another competition."
La Pallaide shocked French football last year by claiming the Ligue 1 title.