Donnarumma is no longer PSG's goalkeeper: yesterday he wasn't even on the bench and after the match he went on the pitch and said goodbye to the fans so it's pretty clear that he won't be playing anymore for them.
And considering City's loss and the bad performance from their goalkeeper I'm pretty sure Donnarumma will join City before the end of the transfer window.
Donnarumma will obviously go to the City. He has personal agreement with City and accepted his new salary on City. The only problem is just between City and PSG for the transfer fees. I expect City to pay him a bit less from what PSG wanted (50m). 40m - 45m range look good enough.
Still enough time to complete his transfer. He's 90% ready to become City's new goalie.