The ornamental design for a gasbarbeque, substantially as shown and described.
FIG. 1 is a left front perspective view of a gas barbeque showing my new
design;
FIG. 2 shows a right side elevational view thereof;
FIG. 3 shows a left rear perspective view;
FIG. 4 shows a left front perspective view showing the cooking grid and
slide handle and carrying handle in an alternative position to that shown
in FIG. 1.