.gsy and .gsd files are the GreenStar brown box log files.   The GS2 uses a totally different logging structure.   SMS 6.5 and older doesn't support it.   I haven't seen a formal position from Ag Leader on support for the GS2 with SMS version 7 that was just released, but I know that they have indicated in the past that they intend to offer support for the GS2 at some time.