What is the name of Gamora's home planet?

Gamora’s home planet is Zen-Whoberi.

Gamora was born among the Zehoberei, an alien people whose world was attacked by Thanos. He claimed that his plan would prevent overpopulation and resource shortages, but his forces killed half of the planet’s population. Gamora survived as a child, and Thanos adopted her after being impressed by her courage during the attack.

Her childhood on Zen-Whoberi shaped nearly every major part of her character. Thanos raised her as an assassin and trained her alongside Nebula, another adopted daughter. He repeatedly pitted the two against each other, creating a bitter rivalry that eventually became one of the MCU’s more complicated family relationships.

Gamora later escaped Thanos’s control and became a member of the Guardians of the Galaxy. Her history explains why she understands Thanos’s worldview so well, while also making her one of his strongest opponents. The planet is often confused with Xandar, where the Guardians first unite and fight Ronan, or Vormir, where Thanos sacrifices Gamora to obtain the Soul Stone. Those are important locations in her story, but neither is her homeworld.