The Catalan side have 68 points, seven ahead of Atletico Madrid, who visit Alaves on Sunday, and 10 clear of fifth-placed Athletic Bilbao, who drew 1-1 at home to Granada on Friday.
La Liga leaders Real Madrid regained their seven-point cushion at the top on Sunday as they benefited from two own goals in a comfortable 4-0 home win over struggling Celta Vigo.
"Getting the three points at home is the most important thing to be at the top," said defender Yan Couto.
After Real Madrid drew in Valencia the night before, surprising title challengers Girona had a chance to reverse their recent slump and regain some ground.
After leaders Real Madrid were held to a draw by Rayo Vallecano on Sunday, the Catalan minnows, second, hoped to cut the six-point gap but lost in a gripping clash at San Mames.
Barcelona have little room for error if they are to defend their LaLiga title, manager Xavi Hernandez said on Friday ahead of his side's trip to Celta Vigo.
Regarding his thunderbolt, Vinicius added: “I don't tend to shoot from outside the box but I felt confident and I didn't get to play the last game and it came off. I'm thrilled but now we have to rest up before Tuesday."
League leaders Madrid opened up a five-point gap on shock title challengers Girona, second.
Real Madrid defender Antonio Rudiger is set to miss important upcoming matches against Girona and RB Leipzig as the club confirmed Saturday he has a thigh injury.
Atletico Madrid climbed third, above struggling champions Barcelona on goal difference, with a comfortable 2-0 win at home against Valencia.
After Real Madrid scraped a controversial 3-2 win over bottom side Almeria and a treble by Ferran Torres helped Barca win 4-2 at Real Betis, Girona demonstrated their title credentials
Girona coach Michel Sanchez insisted his team cannot keep up with La Liga leaders Real Madrid despite their stunning 4-3 win over Atletico Madrid on Wednesday to pull level in first place.
Shock Spanish title challengers Girona snatched a remarkable 4-3 victory over Atletico Madrid to keep pace with Real Madrid at the top of La Liga on Wednesday.
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Girona have been the surprise package of the season and have stretched their unbeaten streak to 11 league games.
Girona, part-owned by the owners of Manchester City, opened up a two-point lead over Real Madrid after a straightforward victory.
Girona defeated their Catalan rivals for the first time ever in the top flight in a pulsating battle to rise two points above Real Madrid, second, after their 1-1 draw at Real Betis on Saturday.
"Will they feel the pressure in the last part of the season? They might. But we said the same of Leicester," said Garcia
Coach Michel is determined to enjoy Girona's "history-making" La Liga run after Saturday's 2-1 win over Valencia 2-1 and not think about the title race because his team are "not at that level".