The ornamental design for a gameboard, substantially as shown and described.
FIG. 1 is a top view of a gameboard embodying my new design.
FIG. 2 is a front or side view of a gameboard embodying my new design.
FIG. 3 is a perspective view of a gameboard embodying my new design.
FIGS. 4-6 are corresponding views of variations of my gameboard showing
other designs of the centerpost which may be embodied in the ornamental
design of my invention, replacing the hollow cylindrical centerpost shown
in FIG. 3.
FIG. 7 is a top plan view of another embodiment of my design which is
shaded for color.