Gibbs reckon the goalkeeper proved himself in Arsenal’s 3-1 victory over Partizan Belgrade in the Champons League on Tuesday.
Fabianski saved a late penalty kick in the game.
“He is a great keeper or else he wouldn’t be here at Arsenal,” Gibbs said.
“I owe him a lot, although I can’t really remember much about (giving away) the penalty.
“He put in a great performance. That is what he is in the team to do.
“Saving the penalty was just as important as scoring a goal for us.
“I think he felt like he had a point to prove. He has shown great character and he doesn’t hide away.
“We do feel for him (after the criticism he has had) because we know his quality and he has shown them against Partizan – that is why I think he expressed that after he had saved the penalty and all credit to him.”