I don't have the exact timing of Gojo's death in the manga at hand. But usually, you can find such crucial plot points by closely following the story's progression or referring to fan communities and discussions dedicated to the manga.
Well, it depends on how you interpret the story. Technically, Gojo Satoru's fate is quite complex and can be seen as a sort of death in some respects, but there are also elements that leave room for interpretation.
Well, unfortunately, Gojo did meet his demise in the manga. This plot twist came as a surprise and left fans both heartbroken and eager to see how the story would unfold without him.