A Gatherer outpost was a small encampment of Gatherers, the nomadic marauders who hailed from the planet Acamar III. The first of these outposts was established in 2266. Since then, these outposts have moved location, from star system to star system, making them difficult for Acamarians and Starfleet alike to find them. In 2366, a Gatherer outpost was discovered on the planet Gamma Hromi II by the Federation starship USS Enterprise-D.
In 2366, the Gatherer outposts were mentioned in the birth record of Volnoth, which was accessible to the crew of the Enterprise-D via the Acamarian planetary database. (TNG: "The Vengeance Factor", okudagram)