History of World Gear

World Gear is the gear category tied to the Throne World destination. The Throne World Engram (Season 16) awards a previously acquired Throne World weapon, and World Gear if none has been acquired (light.gg, via search summary).

Throne World gear is made up of 10 weapons and armor sets, with the Psychohack origin trait on weapons, and drops from Fynch reputation, public events, patrols and chests (Blueberries). That page does not use the term "World Gear", so the engram definition is thinly sourced.