Gomis scored a hat-trick in the 4-1 win at Olympique Marseille in midweek to fire Lyon to the top of the table before they host champions Montpellier and PSG travel to improving Nice on Saturday.
Lyon have 28 points from 14 games and lead PSG by two points with OM third behind the capital side on goal difference.
"Both clubs [Lyon and OM] are in the title race to compete with Paris," Gomis told reporters.
PSG's football has been far from impressive this season and they have been heavily relying on Ibrahimovic, who has scored 12 goals in 11 league appearances.
"On paper, Ancelotti has the best team, the best squad. But it does not fall into place in the twinkling of an eye," France coach Didier Deschamps, told BeIN Sport TV last week.
Lyon's game, instead, is more collective.
"Our strength is to make our opponents run by playing one-touch football," said midfielder Maxime Gonalons.
"Everything goes fast. We host Montpellier and if we are not careful, the Toulouse accident can happen again," said Gomis.
"We're struggling physically, but when you win, you recuperate faster," he told reporters.
