Nute Gunray is a creepy failure who is one of the less comptetent leaders of the CIS. He tried to invade Naboo with a massive army and failed, and considering Naboo is a planet with no weapons, and with a population consisting entirely of old men and small children, this pretty much made him a failure from the start.
Count Dooku saw something in him apparently, and recruited him into the CIS for his money. Nute turned out to be a complete liability and was captured many times, however, he somehow managed to outlive both Dooku and General Grievous, who could both fight with lightsabers. Odd.
Nute Gunray was finally put down by Anakin Skywalker as part of his transformation into Darth Vader.
Nute and his minion Rune converse with Darth Sidious