Never... you'll never get it. GAG totally scammed you. :( Anyway, you'd think they would have contacted you by now. Weird. If it works like any other gift card, you should be able to choose which version you want to use it on. Perhaps send one of the admins a message?
They should send it to your email so check your email first, also remember to check your spam folder as it might have gotten put in there. If you haven't received it yet, you can contact the admins here: www.girlsaskguys.com/contact