Just think of Gatsby as your central character and place events involving him in order of the narrative structure.
Early in the novel we learn that people know who Gatsby is, that he has a ton of money, and that he lives close to our other characters. We also learn a little about Tom and Daisy's marriage. This is introduction, or exposition.
Then, we learn that Daisy and Gatsby had a relationship earlier and that Gatsby's intentions in coming back were to win back Daisy. He goes through great pains to arrange this. These are acts of rising action.
The climax, or conflict, occurs when our central character faces a change in power. Up until this point, Gatsby was slowly gaining power in the wooing of Daisy. The conflict occurs in the hotel room when Gatsby and Tom force Daisy to make a decision and she doesn't make a clear-cut one.
Falling action happens very rapidly in the novel with Daisy and Tom going home and staying there. Most of the falling action occurs outside the narration as Tom has a secret conversation with Wilson leading Wilson to head over to Gatsby's house.
The obvious resolution of this novel is the killing of our central character and the attempt of Tom and Daisy to stay together.
The great gatsby begins with the exposition of being at Tom and Daisy's house, which cyclically forebodes the relentless and aimless cycle of parties- this is the expostition.
the rising action- nick visits the parties/ ch 3 is enthralled and overwhelmed by the vast 'menagerie', 'simultaneously repulsed and attracted' to 'human life'. he also meets gatsby, goes to new york city, and begins to hint at gatsby's corruption, and his 'unshakable' dream.
climax- daisy and gatsby meet- gatby's dreams at once appear met and relaised. The chapter appears to stand out from the rest of the novel, being so self contained. it also appears like prose extremely poetic, enhancing the sickly romantic importance of it to gatsby and how this dream is timeless to him.
the falling action- arguably is the aftermath of these events/ the 'hostile' meeting of the adulterors in ch 7 - murder of myrtle. 'holocaust complete'
resolution/ gatsby's funeral/ nicks denouncing of tom and daisy and the east/ american dream imagery.