IMO it will never be gone, just lurking deep within Jen's psyche. The first incarnation was way back during Steve Gerber's run of
Sensational She-Hulk after John Byrne's first eight issues, as Bleeding Cool reminded us before Tamaki's run:
https://www.bleedingcool.com/2016/10...ulk-went-grey/
And during Tamaki's run it resurfaced, albeit with some changes as we all saw.
Gray She-Hulk is Jen's "dark" side, much as Malice was Sue Richard's dark side. Other heroines like Scarlet Witch and Jean Grey have gone dark too. It can be jarring to the fans, and the acceptance level depends on large part on how well the transition to the dark side is written.
So no, I highly doubt it is gone permanently.