Gamora next showed back up again in WARLOCK #15 telling Thanos that watching him work was utterly boring. He then sent her off to keep tabs on Adam Warlock as a kind of bodyguard. The Titan felt freer once she left because he knew Gamora would leave him if she found out about his plans for total stellar genocide. However, Gamora never quite made it to Warlock as Drax the Destroyer, intent on killing all things related to Thanos, blew up her ship.
Gamora's fate remained a mystery until AVENGERS ANNUAL #7 in 1977 wherein she told Adam Warlock that she'd uncovered Thanos' plans for murder on a cosmic scale. When Gamora confronted her surrogate father with the news, he attacked and left her for dead. After hearing what she had to say, Warlock transported her to Soulworld, contained inside the Soul Stone on his forehead.
And there she stayed until the early '90s! First, Silver Surfer visited Soulworld and then Thanos' acquisition of the Infinity Stones in INFINITY GAUNTLET necessitated her return to the physical plane. Though briefly snapped out of existence by Thanos, she returned when Nebula got her hand on the Gauntlet.
Gamora then became the keeper of the Time Gem as part of Infinity Watch, a group that Thanos was also secretly a part of. Over the course of the next two decades she re-established her title as the deadliest woman in the galaxy, agreed to fight the Annihilation wave with Ronan, helped fight off Ultron and the Phalanx in ANNIHILATION: CONQUEST, and became a founding member of the new Guardians of the Galaxy!