The ornamental design for a gateframeextrusion, as shown and described.
FIG. 1 is a top and rear perspective view of a gate frame extrusion showing our new design;
FIG. 2 is a top and front perspective view thereof;
FIG. 3 is a top, front and left perspective view thereof; and,
FIG. 4 is a top, rear and right perspective view thereof.
The bottom is flat and unornamented and forms no part of the claimed design. The portion of the gate frame extrusion is cut away to indicate that no specific length is claimed.