The ornamental design for a guntool, as shown and described.
FIG. 1 is a front elevational view of a gun tool showing our new design; the broken lines in the drawing depict portions of the gun tool that form no part of the claimed design.
FIG. 2 is a back elevational view of the gun tool; the broken lines in the drawing depict portions of the gun tool that form no part of the claimed design.
FIG. 3 is a left side elevational view of the gun tool; the broken lines in the drawing depict portions of the gun tool that form no part of the claimed design.
FIG. 4 is a right side elevational view of the gun tool; the broken lines in the drawing depict portions of the gun tool that form no part of the claimed design.
FIG. 5 is a top elevational view of the gun tool; the broken lines in the drawing depict portions of the gun tool that form no part of the claimed design.
FIG. 6 is a bottom elevational view of the gun tool; the broken lines in the drawing depict portions of the gun tool that form no part of the claimed design.
FIG. 7 is a front right side perspective view of the gun tool; the broken lines in the drawing depict portions of the gun tool that form no part of the claimed design; and,
FIG. 8 is a front left side perspective view of the gun tool; the broken lines in the drawing depict portions of the gun tool that form no part of the claimed design.