The ornamental design for gear holder, shown and described.
FIG. 1 is a perspective view showing the front, left side and top of my new design for a gear holder.
FIG. 2 is a top view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a left view thereof;
FIG. 5 is a right view thereof;
FIG. 6 is a rear view thereof;
FIG. 7 is a front view thereof; and,
FIG. 8 is a perspective view showing the using reference.
The broken line showing of a gear holder is for the purpose of illustrating portions of the article and forms no part of the claimed design. Additionally, the broken line in FIG. 8 is for the purpose of illustrating environment that forms no part of the claimed design.