Gnabry left Arsenal when Wenger was still in charge at the Emirates Stadium, after just a handful of appearances for the senior team.
Gnabry has since forced his way into the starting eleven at Bayern, including a starring role in the 7-2 win against Arsenal’s bitter rivals Tottenham Hotspur, where he scored four goals.
However, Wenger has hinted that he believes Bayern were making covert moves to try and encourage the young star to leave London.
“He was always a very talented boy who lacked confidence in some stages, but we always thought we had a player who could achieve a lot.
“He came back from a very bad experience on loan at West Brom where his confidence was destroyed. I tried to rebuild him because I believed in him.”
“A top-level career is consistency,” he added. “If you look at the players that dominate our sport, it’s the ones that show huge consistency and that’s what is at stake.
“Can he maintain the quality of performances that he showed the other night [against Spurs]?
“I think it was one of those nights where everything goes for you and everything against Tottenham.”