Numbers 3:23

The families of the Gershonites shall pitch behind the tabernacle westward.

Cross-reference

Numbers 3:29 gives the same camping pattern for the Kohathites on the south side — a direct parallel to the Gershonites' position.

Numbers 3:38 places Moses and Aaron east of the tabernacle, complementing the western camp of the Gershonites here.

Numbers 1:53 commands Levites to camp around the tabernacle – the Gershonite west position fulfills that.

Numbers 1:50 Historical context

Numbers 1:50 assigns Levites charge of the tabernacle – the Gershonite camp location supports that role.

Numbers 2:17 places Levites in the center during march – consistent with their stationary camp positions.