Support both gf and gfVersion in charts

source/funkin/backend/chart/BaseGameParser.hx

@@ -28,7 +28,7 @@ class BaseGameParser {
 		});
 		if (!p2isGF && data.gf != "none") {
 			result.strumLines.push({
-				characters: [data.gf != null ? data.gf : "gf"],
+				characters: [data.gf != null ? data.gf : (data.gfVersion != null ? data.gfVersion : "gf")],
 				type: 2,
 				position: "girlfriend",
 				notes: [],
@@ -129,4 +129,4 @@ typedef SwagSection =
 	var changeBPM:Bool;
 	var altAnim:Bool;
 	@:optional var camTarget:Null<Float>;
-}
+}