what happened to Girona 
In fact, usually they can compete optimally against various levels of clubs, even big clubs. However, this time, they were unable to win against the lowest club in La Liga, Almeria. ....
We cannot expect Girona always be overcomes their opponents for each matches because basically they only as dark horses team status in Laliga so it's not easy for Girona to managed their consistency and defend their position on league standings and just like i said before Almeria is not easy to beated so Girona shouldn't be underestimate them and finally yesterday Girona was slipped because they unable beat weak team Almeria and i assume why Girona was failed to win is because they losing some players and apparently that had a huge impact on their performance yesterday besides that Almeria know Girona as one of the teams with the best front lines in Laliga so Gaizka Garitano has decide to used 5 defender players to strengthen Almeria defensive lines because in my opinion Almeria was targetting the draw result from this match and this strategy can work well because Girona players looks very difficult to broke the defense of Almeria In fact, usually they can compete optimally against various levels of clubs, even big clubs. However, this time, they were unable to win against the lowest club in La Liga, Almeria. ....
Maybe because the opponent was Almeria, most of us thought that Girona would be able to handle it quite well by winning as usual. They have been quite consistent so far, but in the match against Almeria this time they conceded quite a bit. So Girona was not able to penetrate their defensive goal easily. Yes, as you said, Almeria has indeed improved their defense enough so that they can anticipate all attacks from Girona. And it really works. Despite the disappointment against Girona, on the other hand, the defense provided by Almeria is also not bad where they are usually quite careless and quite weak in this line. but today, they were impressive enough to hold Girona to a draw.
Anyway, in general I really believe that Girona will nearly impossible to complete this season in top four, not yet mention about their chance to win La Liga title against Real Madrid. Even if they won't complete this season in top four, this season will be marked in their club history as one of most amazing seasons and I don't think they will get another amazing season like this in future.
Yes, their point difference is in the range of 5-8 points. And we're still in the middle of the season. So, according to calculations, there is still a possibility for both clubs, especially Barcelona, to take over Girona's position. But this certainly won't be easy because this means Girona will have to lose at least several times. Meanwhile, they still seem to be on fire (regardless of the results of the match with Almeria, hopefully it won't have a big impact on their mentality and motivation). So, I think that if Girona is able to maintain its performance and can actually improve every performance, being more alert in every match, their chances of staying in the top 4 will be quite big compared to other clubs. So, at least, maybe their target will be to enter the UCL qualifiers, and of course this will be a remarkable event for Girona and also for La Liga events so far.