The Gopso'o were a tribe of Drovians from Nim Drovis. Though virtually identical to their rival tribe, the Drovians, the two were at war for longer than either side could remember. If a Drovian that Ism Oolos interviewed was to be believed, Gopso'o seemed to enjoy killing innocent family members of their Drovian enemies. After the events of the Death Seed plague, the New Jedi Order mediated a truce between the Gopso'o and the Drovians.
- Planet of Twilight (First appearance)
- The New Jedi Order: Agents of Chaos I: Hero's Trial