It seems that İlkay Gündoğan has no intention of going anywhere. Galatasaray wanted him very much, but after yesterday's game he made a statement that I have a contract for one more season and I'm very happy here. I believe I have a few more years at the top level, he said, which shows that he doesn't want to leave the Top 5 leagues.
If Manchester City decide to let him go again, his new club will be at least as strong as Barca. I don't think he will go to Galatasaray and I don't think City will give him to other Premier League teams either. He may struggle to keep up with the pace, but he still has a lot to offer. He didn't miss a game last season.
Gündoğan doesn't have a plan to leave. He's just getting better in CWC, and have his confidence back like before he left City, then gone to the Barcelona. He scored a lot for City, and too good to be true to expect him to leave soon.
He's ballers now. Impossible to leave when he has very good performance in City.