The duties of the Gershonites at the Tent of Meeting were the tabernacle and tent, its covering, the curtain for the entrance to the Tent of Meeting,
Jewish Publication Society of America Version (JPS1917) - Numbers 3:25 >and the charge of the sons of Gershon in the tent of meeting the tabernacle, and the Tent, the covering thereof, and the screen for the door of the tent of meeting,