Wenger thinks Gnabry has a big chance to hold down a place in the starting line-up.
"It's a fantastic opportunity for him," Wenger told Arsenal Player. "He can play right or left or even behind the striker. He can even play as a striker. I believe against Stoke what I liked in his game is that he grew through the game, he became better and better.
"He was a bit timid in the first half but in the second half he made some good interceptions, some good passes and some good first touches that I liked."