I am a GSSF member. I finally got my welcome package in the mail a few days ago. It consisted of a hat with removable Velcro patch on front, shirt patch, glock professional stickers, 2 magazines, member card, and I think that's it...
Go ahead and sign up for 2 years so you can get your purchase voucher. Members get to buy a glock at a member price rate once per year. If you sign for 1 year then you only get the voucher after you renew your second term.
I have fired in 2 competitions and I plan on firing in one in Knoxville June 2-3. You can go to gssfonline.com. Im still new but it seems like an ok thing to be a part of.