The ornamental design for a plantationhousegiftbox, as shown and described.
FIG. 1 is a perspective front view of a plantation house gift box;
FIG. 2 is a front elevation view of the plantation house gift box; the rear elevation view being a mirror image there, and the broken lines removed for ease of illustration;
FIG. 3 is a left side elevation view of the plantation house gift box; the right side view being a mirror image thereof;
FIG. 4 is a top plan view of the plantation house gift box; and,
FIG. 5 is a bottom plan view of the plantation house gift box.
The Hawaiian plantation camp house art design is shown in broken lines for illustrative purposes only and forms no part of the claimed design.