The ornamental design for a finishgate for drone, as shown and described.
FIG. 1 is a first front perspective view of a finish gate for drone showing the new design.
FIG. 2 is a second front perspective view thereof;
FIG. 3 is a rear perspective view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a left side view thereof;
FIG. 8 is a top view thereof;
FIG. 9 is a third front perspective view thereof; and,
FIG. 10 is a fourth front perspective view thereof.
The finish gate for drone is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.