There is more information to this than just a coach who led Girona to the top of La Liga with his "cool hands". Girona is well financed. It is not a club that came out of nowhere and played its way to the top with mediocre players. They have invested big time in infrastructure and they have a well formed team within the club that understands how to build football teams. The City Football Group is backing it and they have the money to make sure that the coach stays if they want to keep him. By now the City Football Group owns 12 clubs worldwide. The chairman of Girona is so called Pere Guardiola, got it?

The brother of Pep Guardiola. There are no amateurs at work.
It's a clever move by the City Football Group as they always surprise with a small amount of money but the way they do it is clever. Instead of turning Girona into an instant hit they prefer a more conventional approach where starting from scratch is the way to go.
This season even if you look at Girona is one of the clubs in La Liga with the youngest age range because their players are on average 26.3 years old but their performance is more than expected especially in this season they always surprise us with excellent games and it was not even predictable before that Girona reached this point where they are still perched in the top 4.
Even though in recent weeks their performance has declined a bit and it's like running out of gas while racing but that doesn't reduce the praise for them who are still able to compete with some of the big clubs that subscribe to the top 4 each season.