In short, Gamora is blameless for a lot of things, but there is also no denying that she made some mistakes.
Sure, she didn’t specifically name the planet in conversation, but she also really shouldn’t have been talking about it at all with someone who her stores memories on a hard drive.
Right off the bat there’s the fact that Gamora once served Thanos by discovering the locations of the Infinity Stones, but her biggest mistakes all specifically involved the Soul Stone.
First there is the fact that she went as far as to learn the real whereabouts of the ingot on Vormir (she could have just half-assed the job), but she also made the mistake of telling Nebula about it.