The ornamental design for a gunhangerdevice, as shown and described.
FIG. 1 is an isometric view of a gun hanger device showing my new design;
FIG. 2 is a side view of the gun hanger device;
FIG. 3 is an end view of the gun hanger device;
FIG. 4 is a top view of the gun hanger device; and,
FIG. 5 is an isometric view of the gun hanger device showing it in use.
The broken line showing a portion of a gun mounted in the gun hanger device, and the rod from which the gun hanger device is suspended is for illustrative purposes and forms no part of the claim.