F. Scott Fitzgerald's novel "The Great Gatsby" is not generally considered to be an example of stream-of-consciousness writing. The narrative follows a more traditional structure, with a clear and linear plotline and a third-person narrator who provides a detached perspective on the events of the story.
That being said, Fitzgerald does incorporate some elements of interior monologue and free indirect discourse, which allow the reader to gain insights into the thoughts and emotions of the characters. For example, in the famous opening paragraphs of the novel, Nick Carraway reflects on his upbringing and his motivations for coming to New York City. Similarly, throughout the novel, readers gain glimpses into the inner worlds of characters such as Jay Gatsby and Daisy Buchanan through their dialogue and actions.