Gibbs told reporters after the game: "[The win] was massive. We didn't give up and we have made a statement of what we want to do. We controlled quite a lot of the game and the final ball was letting us down.
"We had to keep going and we got the rewards. We are determined to do well as a team and everybody is fighting for each other. We have another big game in two days and we have to focus on that now.
"The boys all give 100 percent for the team. Some days it happens and other days it doesn't, but we stay professional."
Arsenal are second in Group D, five points ahead of Anderlecht and Galatasaray.