I have heard that if manchester city unwilling to sell him to its competitor. If gundogan will be going to the arsenal and it seems like that rumor was not true. Remember that arsenal became a good team caused by it was getting some players from manchester city in the past. I will support gundogan to go to the barcelona rather than arsenal. Gundogan has not yet decided his future and i think that the rumor about he will be going to the arsenal will not true.
Gundogan may stay or go to the barcelona. I prefer to see him join in barcelona. It will be far better for him.
Latest rumor, İlkay Gündoğan has reach personal agreement with Manchester City extend his contract one year later, I don't think with Pep Guardiola want to sell İlkay Gündoğan regarding his contribution success give treble winner for Manchester City in this season. İlkay Gündoğan is main player for Manchester City in this season and he has quit well performance in midfielder position, not sure Guardiola will sell him to the rival teams Arsenal or Barcelona.
İlkay Gündoğan still on celebrate the champion league achievement right now and seems still waiting for his announcement keep extend with Manchester City or looking for new challenge next season by joining with Arsenal or Barcelona, but if want get tittle next season better stay with Manchester City than move to other teams.