I'm not sure whether all BG checks are visible in GCMS. I ordered GCMS this summer, and the only thing that looks like a BG check dates back to Feb 2020. Nothing has a date around Feb 2021.That's correct. BG check is valid for one year. Since the 1st one was done in Jan 2020 for you, I assume the 2nd one was done between Jan-March 2021. But when exactly, you can only know by the GCMS notes (they should update the new tracker with this info to make it easier for us). I suspect if you get DM soon (which I believe it will happen to you), they will schedule you for the oath before your BG expires, because otherwise it will take another 2-3 months to update your clearance.