It starts at a specific point in the manga, but I can't recall exactly without looking it up. You might want to check some manga forums or dedicated fan sites for the precise chapter.
Sukuna does die in the manga. The way it happens is quite dramatic and ties in with many other elements of the story, adding depth and tension to the overall narrative.
I'm not entirely sure specifically what 'gojo web novel' is about as there could be many web novels with that name or something similar. It could be about a character named Gojo in a fictional story, perhaps set in a fantasy world with magic, adventures, and unique characters.
I'm not entirely sure specifically what this 'gojo bondage light novel' is about as there could be many interpretations. It might be a story that involves a character named Gojo in some sort of binding or restrictive situation, perhaps in a fantasy or fictional world where unique powers and relationships are explored through the plot.
No. Ryomen Sukuna is a fictional character from Japanese mythology and modern manga/anime. He doesn't have a basis in a true historical event or person.
Nope. Ryomen Sukuna has no basis in reality. It's a product of the creative minds of the writers and illustrators who designed a captivating fictional character for the enjoyment of the audience.