The 30-year-old has refused to rule out the reigning champions in the title race but is hopeful his side can retain their lead until the final day
The Vicente Calderon side currently sit atop of the table, holding a three-point lead over Barca, while third-placed Real Madrid are trailing by five points ahead of their game in hand on Wednesday.
Atleti lock horns with Malaga at the weekend before travelling to Barcelona on the final day of the season and Gabi has warned that the Catalans will not give up hope of retaining their title.
"We're in a privileged position of being able to depend entirely on ourselves. We'll be trying to win on Sunday against Malaga and then close the season at Barcelona, who will also be doing everything they can to win their last two games," Gabi told reporters.
"The Barca players have demonstrated their professionalism and they're still candidates for La Liga right now, even given where we are and have the lead.
"The only way for us to be champions, as far as we're concerned, is to win our game on Sunday and get at least a point at Barcelona."
Atletico remained unbeaten in five games against Barca this term and Gabi is confident they can get another good result against the Catalans on the final day of the season.
"We've already shown we're capable of beating them," he added.
"We've had a lot of games against them, we've drawn four and won one, so we'll go there and try to beat them again."