The ornamental design for a garmentstrappingsystem, as shown and described.
FIG. 1 is a front elevational view of the garment strapping system.
FIG. 2 is a back elevational view thereof; and,
FIG. 3 is a side elevational view thereof.
The garment strapping system is shown with a break to indicate non-specified length. The appearance of any portion of the article between the break lines forms no part of the claimed design. The broken lines shown in the drawings are included for the purpose of illustrating environmental structure and form no part of the claimed design.