The ornamental design for a gnomeornament, as shown and described.
FIG. 1 is a Perspective view of a gnome ornament showing my new design;
FIG. 2 is a Front view thereof;
FIG. 3 is a Back 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 another left side view of FIG. 1 showing the cap in a bent position.
The broken lines showing a circular ball at the edge of the cap in FIGS. 1-6 and the portions of the gnome ornament shown in broken lines in the bottom view of FIG. 7 form no part of the claimed design. The remaining broken lines shown on the cap in FIGS. 1-6 represent thread stitching and form no part of the claimed design.