Both idolise wealth and luxury, falls in love and marries a woman out of his social class.
When Zelda gave birth to their daughter she said, 'I hope it's beautiful and a fool- a beautiful little fool'- link to Daisy.
Fitzgerald tries very hard to prove his social standing and secure her love. However, unlike Fitzgerald, Gatsby didn't indulge in alcohol nor did he get involved in his parties. Fitzgerald was an alcoholic and him and Zelda indulged in the hedonistic decadence of the decade.
Much like Gatsby's life, Fitzgerald suffered a lot of sadness in his endless pursuit of happiness.
Fitzgerald never felt enough for Zelda, believed he did not deserve her- reminds us of Gatsby's love for Daisy.