I claim the ornamental design for a gate, as shown and as described.
FIG. 1 is a perspective view of the gate.
FIG. 2 is the front view of the gate.
FIG. 3 is a back view of the gate.
FIG. 4 is a side view of the gate.
FIG. 5 is the other side view of the gate.
FIG. 6 is a top view of the gate; and,
FIG. 7 is bottom view of the gate.
The gate handle and lock as well as the gate wood inserts are shown in broken lines are for illustrative purposes only and do not form part of the claimed design.