The win secured Girona's LaLiga status for next season after struggling this term with the workload of their Champions League campaign.
Afterwards Michel, who spent time in the hospital last week, said: "There's a lot of joy, that's normal. It's a huge step forward, but we have to see the rest of the results.
"I told the players that we're closer. The team needed this victory, and we achieved it through hard work. We have to celebrate this win because it gives us peace of mind today and, I hope, for the rest of the competition."
Stuani a real star
On Stuani, Michel was effusive: "He's the captain, the most important player in Girona's history. He came in with a serious knock to his leg, and we were hesitant until the end about whether to put him on or not.
"He came off for the last half hour, and I'm very happy for him because he deserves it.
"He's 38 years old, but he continues to give lessons in front of goal because he's a real star."