Please give us more information -- are you referring to the critical response to the novel? If so, you can read about this here on eNotes at the link below. This novel was Fitzgerald's third novel. His first novel, This Side of Paradise, was well-received, but his second was not as successful (The Beautiful and the Damned), so Fitzgerald was worried about how this third one would be received. It wound up being very well received and today is considered his best novel. Contemporary critics as well as fellow novelists mostly praised The Great Gatsby, but there were some comments that were not 100% favorable. You can read about those comments at the link below.
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