Gyøkeres has chosen Arsenal over any other team, and I'm confident they'll complete the deal.
Has this deal not been completed already? Gyokores to Arsenal is a done deal already, the next discussion for Arsenal is the player they will fix in the RW. He will be lethal there considering the number of goal scoring chances that Arsenal create.
If Manchester United didn't have anyone to sign, Jackson shouldn't be their final option.
There's still a very good chance that Jackson finds the success that he searched for in Chelsea in Manchester United, he is still a very young striker and can still do very well for a team that has real focus on developing him. As for Chelsea I think they've moved on from what he can offer them, he has had his time in the club and his time for him to leave.