That way I am sure Girona will not be able to freely if Barcelona plays a squad like that. But this is just my assumption, and for that we will see this match tonight. Because as you said this match is really very important for Barcelona to be able to stay ahead in terms of points over Real Madrid. And in this match I will bet on Barcelona, because Barcelona is certainly more convincing to be able to win this match.
In this season Girona are no longer as strong as they were in the last season and Barcelona in contrast have become much stronger than themselves in the past season. Two clubs move and change oppositely in this season and in this direct match, Barcelona have very high chance to beat Girona. They must win this match to maintain 3 point difference with Real Madrid and their leading position in La Liga, but also to prepare as best as they can for UEFA Champions League quarter final matches.
I agree with you that Girona are not competitive enough against Barcelona and their chance of getting points, even only one point, in this match is very low. Their highest chance in this match is getting a defeat but as in other matches, Girona will try and get points so they will make sort of challenge against Barcelona.