I claim the ornamental design for a gutter protection device, as shown and described.
FIG. 1 is a perspective view of the gutter protection device.
FIG. 2 is a side view of the gutter protection device.
FIG. 3 is a top view of the gutter protection device.
FIG. 4 is a bottom view of the gutter protection device.
FIG. 5 is a front view of the gutter protection device; and,
FIG. 6 is a rear view of the gutter protection device.
The evenly dashed broken lines depict environment only that form no part of the claim. The dash dot broken lines depict boundaries of the claim that form no part of the claim.