- "My lord, is that... legal?!"
- ―Nute Gunray and Darth Sidious
He became Viceroy of the Trade Federation because, at the conference during which the rest of the Trade Federation Directorate was murdered, he was, I dunno, in the space-port-a-loo or something. Anyway, he became head of the Federation, a job which largely involved minimal mouth articulation and profuse sweating. Regardless of his general ineptitude, he excelled at staying alive by running away, making him in effect the Rincewind of the Federation.
He took a mistress during this time, and it was known that he was the domineering sort in the relationship. Unfortunately for grub-face, he and Wat Tambor were killed by Darth Vader. Gunray died before he could even finish his last words. Likely no one would have understood them anyway.