Conversation so far:
What was Gore Vidal's first screenplay?
Gore Vidal's first screenplay was Climax!: A Farewell to Arms.
How did Gore Vidal become involved in Ben-Hur?
In 1958, the director William Wyler required a script doctor to rewrite the screenplay for Ben-Hur, originally written by Karl Tunberg.
Was Gore Vidal work on Ben-Hur successful for him?
Yes, in exchange for rewriting the Ben-Hur screenplay, on location in Italy, Gore Vidal negotiated the early termination of his four-year contract with MGM.

Question: Where did he go after that?
Self-contained rewrite: Where did Gore Vidal go after the early termination of his four-year contract with MGM?