Does anyone know of locations where Schützenschnur and/or GAFB testing is held annually?

Ft. Knox, KY held every March/April and October.

I would say to seek out the German Army Liasion Staff, every post I have been stationed at stateside has had German Military Representatives. These badges are annual requirements for the German Soldiers so with coordination they will usually allow US Soldiers to test along side their Soldiers or run events for the our Soldiers.

We just completed one at Fort Bliss late last month...I think they do them two or three times a year here. I know they also do them at Fort Leavenworth and Fort Bragg, and I have heard Benning does them as well. If you find a location with a German contingent then just contact them and inquire...you may be able to get into the next one. At Bliss units were allocated a certain number of slots based on size and then were extras available for add ons.