The 23-year-old Manchester City winger is a target for the German champions but Bayern may be forced to pay as much as £90million for his services.
Despite the fact that Sane would rival Gnabry for his place, the former Arsenal winger said: “I would love to have him in my team.
"We get along really well, also off the pitch.
“He would help any team and it's very fun for me to play with him. He would be a real asset for Bayern Munich."