FIG. 1 is a top plan view of an ornamental design for a gear locking tool of the present invention;
FIG. 2 is a right side elevation view of an ornamental design for a gear locking tool of the present invention;
FIG. 3 is a front elevation view of an ornamental design for a gear locking tool of the present invention;
FIG. 4 is a left side elevation view of an ornamental design for a gear locking tool of the present invention;
FIG. 5 is a rear elevation view of an ornamental design for a gear locking tool of the present invention;
FIG. 6 is a bottom plan view of an ornamental design for a gear locking tool of the present invention;
FIG. 7 is a top isometric view of an ornamental design for a gear locking tool of the present invention; and,
FIG. 8 is a bottom isometric view of an ornamental design for a gear locking tool of the present invention.
