Hmm... I know the character was written as Saavik in early drafts of the script, but Saavik wasn't Gene's creation, so I'm not sure why he'd care.
This anecdote was around during the making of ST VI, and then Nick Meyer repeats it on the ST VI DVD SE commentary. GR, in his capacity as Executive Consultant (ie. commenting on all draft scripts, even though no one had to listen) always used to tell the fanbase that if a ST script displeased him so much he'd have his name withheld from the credits, so we'd know that he disapproved.
He almost withheld his credit from ST II (and Majel had asked not to be written in as Chapel to show her support for GR). He almost withheld for ST V, but settled for claiming some elements to be "apocryphyl". For ST VI, he wrote a memo to Nick Meyer that Saavik shouldn't be a traitor because the fans held her as a "beloved character" - much to Meyer's amusement since Saavik had been Meyer's own creation, and she had been one of GR's sticking points about ST II.