Well, you are right because of the ability and possibility of Girona to finish in the top 4 which is quite clear and achievable if they keep working hard to win the next few games ahead, yeah they can keep accumulating more points from winning the weaker clubs and even if their are not able to win all the games against other stronger teams like Real Madrid or Barcelona who are the two most strong clubs in Girona line up for the season.
Although it may be tough but believe me with the current state of Real Madrid, defeating or playing a draw against them is much more easier for Girona than it is for them to come up against Barcelona.
Yeah at this pace any club can achieve top 4 but there are lot of things that can happen still. Key thing is that Girona have been able to maintain their consistency against mediocre and weak sides. They also have defeated some big teams on the way and they have managed to squeeze out maximum out of the matches as they could but the thing is that they haven't had been hit with injuries and possible that with such intensity their players also might get injured in upcoming matches so that is where they might give the other teams chance to overtake them on the table. Barcelona is coming up soon in 3 weeks so that should be a good test for them.