The ornamental design of a load gate, as shown and described.
FIG. 1 is a front elevational view of a load gate showing our new design, with the corresponding rear elevational view being substantially symmetrical and therefore not shown; and,
FIG. 2 is a partial right front perspective view of a forwarder including a load gate showing our new design, with the corresponding partial left front perspective view being substantially symmetrical and therefore not shown.
The broken line showing of is for illustrative purposes only and forms no part of the claimed design.