The star, who regularly speaks out about animal-welfare issues, shared a petition to his 13.4 million Twitter followers captioned 'Do your stuff, guys!'.
The petition, created by Compassion In World Farming, has already received more than one million signatures: enough to call on the European Commission to end the 'inhumane treatment of farm animals'.
'A true animal lover'
"Just like my character Tony in my comedy series After Life, I'm a true animal lover," Gervais said.
"I can't bear to think of animals suffering, yet across Europe, hundreds of millions of farm animals are confined in cages on factory farms. Together, we can rid Europe of this horrendous cruelty. Please join me, sign the initiative to ban cages, and help me reach my target."
Earlier this year, the celeb blasted Britain's most controversial horse race, the Grand National, after the first horse since 2012 died during the main race.
Gervais asked: "Why would you gamble with a horse's life for fun? #YouBetTheyDie."