Gundogan is surprised by the manner of Aubameyang's move from Borussia Dortmund.
Ex-BVB midfielder Gundogan said: “I don't know if I could have done it like Auba did.
“At that time I was also criticised for my open change intentions at BVB. The reaction of the fans I understood a bit.
"But I only wanted to be honest and always gave everything for the club."
Gundogan added to BILD: “Dortmund loses a very, very good player.
“I very much hope that now peace is restored. Because you need it to be successful in the Bundesliga. All the bickering was certainly not conducive for the performance of the team.
“As a player you get on with it, and if you read any negative things in the paper every day, then it's a burden. That's a hindrance to getting full performance.
“I keep my fingers crossed for BVB that the club qualify for the Champions League. It would be nice if I see the boys there again next season."