An 'accelerator novel' could also be part of a new genre or a term used by a specific group of writers or readers. It might combine elements of science fiction and thriller, where the accelerator is not just a physical object but also a plot device that accelerates the overall narrative. For instance, it could be a device that speeds up time in the story world, leading to all kinds of unforeseen consequences for the characters.
It's hard to pinpoint exactly where Gojo is at any given time in the manga. His whereabouts change as the story progresses and different scenarios unfold. It could be in a supernatural realm, a mission site, or interacting with other characters.
Gojo Satoru's fate in the manga is indeed death. This event has significant implications for the story and the characters around him. It changes the dynamics and raises the stakes for the remaining plotlines.