The 28-year-old has had a tough time in front of goal this season.
PSG midfielder Blaise Matuidi had put Les Bleus two nil up before Newcastle striker Aleksandar Mitrovic pulled one back.
Giroud had an ineffective night in front of goal and was taken off in the 62nd minute, heaping more misery on a player who has endured a difficult start to the season.
Much has been made of Arsenal’s need to strengthen up top and Giroud is viewed, by many, as an inadequate forward to lead a title challenge.
The Arsenal striker addressed his performance after the game and while admitting he wasn’t at his best, remained defiant that he would come through this sticky patch.
"As a striker, what you got used to on a daily basis, it is to be applauded when you score goals. When the opposite happens, it's difficult. Everybody got criticised one day," he said, in quotes published by Goal.com.
"That's not the first and surely not the last time it happens. I have the mental strength to bounce back. Now I am going to focus on working. I am everything but worried about that. I will bounce back.
"Tonight I miss some efficiency. It is like it is. I cannot focus too much on it. I have to think about the victory of the team and the good form we currently are experiencing," he added.
The Frenchman’s words suggest a player fully aware of the pressure he is under and eager to put things right sooner rather than later.