The ornamental design for a garmentdufflebag, as shown and described.
FIG. 1 is a front perspective view of a design of a garment duffle bag as claimed herein.
FIG. 2 is a front elevation view thereof.
FIG. 3 is a rear elevation view thereof.
FIG. 4 is a right side view thereof.
FIG. 5 is a left side view thereof.
FIG. 6 is a top view thereof.
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a front perspective view thereof, with the garment duffle bag shown in a closed configuration.
The short broken lines showing a shoulder strap are for the purposes of illustrating environment and form no part of the claimed design. The long broken lines illustrate stitching and are part of the claimed design.