Yes, if the title 'aang is a firebender fanfic' is to be taken literally, then aang is likely a firebender within this fanfic. However, without actually reading the fanfic, there could be some sort of plot twist or alternative interpretation that might make it not so straightforward.
He could meet his future self. It would be an interesting encounter as he could learn from his future experiences and wisdom. Or he might meet people who have studied his past adventures and see himself through their eyes.
I don't know the author of 'gordon novel'. There are countless novels in the world, and this name alone doesn't provide enough clues. It might be a self - published work, or a book from a small press. Maybe it's a work in progress that hasn't even been fully released yet, so there's no publicly known author at this point.
It depends on the nature of the Gordon ghost story. If it involves typical spooky elements like sudden noises, apparitions, and a sense of dread, then it could be quite scary.
Well, it's quite possible. If we consider the common elements in novels, characters play a crucial role. So, Gordon could be a character in the novel book. However, without more information about the book, we can't be 100% sure.