Gojo is an incredibly powerful jujutsu sorcerer, and it is possible that he has some kind of immortality ability.
Ultimately, whether or not Gojo comes back to life is up to Gege Akutami, the author of Jujutsu Kaisen. Akutami has not revealed any plans to resurrect Gojo, but he has also not ruled it out. It is possible that he will keep Gojo's status ambiguous until the end of the series.