I think now that Girona has fallen behind Real Madrid, they cannot catch up to them. Real Madrid are currently in good form and catching up to them is going to be very tough. They are going to have to beat Real Madrid in their Head to head match in February as well. Girona had that consistency keeping them in first place but that draw probably cost them the Championship of Spain.
I always loved an underdog run. But Real Madrid was too good for them. But if they can keep up the previous consistency and not drop points, they probably can come back. Barcelona and Atletico Madrid's situation aren't that good either, sitting at 3rd and 4th place respectively. I don't see them taking Girona's place. It kinda feels good to see a small team from La Liga actually achieving something this season.
By only being superior on goal difference, Girona still has a chance to overtake Real Madrid because the two teams can be said to be in the same condition, although doubts about Girona still exist and that is normal considering they are not a team that usually fights for the title.
The draw that Girona got against Betis was also the same result that Real Madrid got when facing Betis, so it can be said that Betis is indeed a strong team when playing at home.
However, the next match after the New Year holiday will be a match where Girona can face defeat because Atletico Madrid will see this match as an opportunity to get 3 points.
Some people here talk as if the last game is about to be played in a few days from now. Goal difference doesn't matter. If you want to, you can check out when it was the last time that the goal difference decided in La Liga who became the champion. I can't remember such an event. It is temporary. And just for anyone's information, in La Liga it would be the head to head comparison when two teams finish the season with the same number of points.
But it is still so early that all these discussions are fun to have, but they lead nowhere since in 4 weeks from now Real Madrid could be leading by 9 points in a worst case. If Girona continues to win their games, then it is going to be exciting.