There is still no action taken about Galtier by PSG. This season can't be counted as successful for him no matter how much he says that it was a good one. Winning the Ligue 1 title is an easy peasy achievement for PSG with a huge strength gap like this with the other teams. As long as they can't be competitive for the Champions League title and win it there is nothing that much admirable.
Galtier already sacked by PSG at the beginning of this month. I think that there's no need to do something about him.
https://www.dailymail.co.uk/sport/football/article-12165769/Paris-Saint-Germain-sack-head-coach-Christophe-Galtier-single-season-charge.htmlEven napoli has seen him as a potential candidate to be a new coach for napoli. PSG is now still looking to sign a new player.
In the end it was going to happen and after the season was over sooner or later this news was bound to be there and it was.
Galtier will not be able to stay at PSG for long, he can be one of the better coaches but his place is not a big club, at least in this case he will not be able to be there considering his qualifications are still below what they should be.
For Napoli it's unlikely to happen now that they've appointed Rudi Garcia as Spalletti's replacement and for that matter I don't even have any expectations of this coach for Napoli next season. Let's hope he does well in the end.