Strange Tales #180 - The Judgement! - The First Appearance
In this issue, Pip runs into Gamora. She tells him that if Warlock plans to defeat the Magus she will join him. If he does not, she plans to kill him.
Strange Tales #181 - 1000 Clowns! - Warlock #9 - The Infinity Effect to Warlock #11 - The Strange Death of Adam Warlock
Gamora fights alongside Adam Warlock to defeat The Magus, the task she was trained for all her life. After his defeat, Thanos gives her a new task, to befriend Adam Warlock and keep tabs on him.
The Avengers Annual #7 - The Final Threat
the Death of Gamora. She is then sent into the Soul Gem with Pip and Adam Warlock