The biggest advantage that Girona has is that they have less pressure than the other teams competing for the La Liga title. In regards to the squad and how Girona is able to get away with injuries and other problems, I can't really judge that as I don't know that club very well, but I suppose that Girona would have more problems dealing with injuries than Real Madrid or Barcelona. Though it makes more fun to see that finally there is one club who was not expected to send their greetings to the rest of the league from the top after 13 games have been played. The next two games are against Bilbao and Valencia and if they play as strong as they did before the break, this will be the next six points to their books.
It just has been 13 matches and there are still lot of matches to determine the top 4 and seriously lot of things can change in remaining games. They have less pressure because they have less expectations but eitherway they are really doing a great job and even if something happens I think they should be able to manage to make it to top 10 by the season end and in my opinion that will be an objective achieved for the season. Being top 4 is also good but that will elevate the fans expectations and that can be good and bad as well later on.
It would be ridiculous if their goal would still be top ten at this point as they are 16 points ahead of Rayo Vallecano who are 10th in the table. It is realistic for them to aim at top seven or maybe top six. They are no weaker than teams like Valencia or Betis, who have been out of shape for a while anyway. If a team leads the table like that after 13 games, I don't think they are still talking about getting away from the relegation zone. It doesn't make too much sense to talk about the title either, but raising the goals can't hurt.