Greg Olear makes the case that Nick Carraway, the protagonist of The Great Gatsby, is gay and in love with the novel's eponymous character. The biographical details that provide the initial impetus for Olear's suspicions:
Here’s what we know about Nick Carraway, from what he tells us in the first few pages of the book: he was born in 1896, so is about the same age as Fitzgerald; he went to Yale, as his father did before him; he fought in the First World War; he resembles his “hard-boiled” great uncle; his aunts and uncles are worried about him; he is, at age 25-26—his birthday is the summer solstice, and occurs during the action of the book—still single. Reading between the lines, we deduce that there is something unusual about him, something that concerns his family. So far, Nick’s is exactly the profile of a (closeted) gay young man in a prominent Middle Western family in 1922.