Well, Gatsby's introduction is a bit complex. It starts with the narrator's curiosity and builds up as we hear about his lavish parties and mysterious background. Little by little, we get more details about him and his past.
Gatsby is introduced gradually through the narrator's observations and the rumors and stories told by others in the story.
Gatsby is brought into the novel through a combination of elements. The narrator's initial encounters, the talk among the characters, and the atmosphere of mystery surrounding him all contribute to his introduction. It's like a puzzle that slowly comes together as the story progresses.