The ornamental design for a "golf bag bottom plate", as shown and described.
FIG. 1 is a perspective view of a golf bag bottom plate, showing my new
design; FIG. 2 is a bottom plan view thereof; FIG. 3 is a top plan view
thereof; FIG. 4 is a left side elevation view, the right side elevation
view being a mirror image thereof; FIG. 5 is a rear elevational view
thereof; and, FIG. 6 is a front elevational view thereof. The broken line
environmental structure is for illustrative purposes only and forms no
part of the claimed design.