Anyone that has ever used or owned an iPhone knows that there isn't a little square just floating around. This isn't an iPhone. It's fake. I'm not accusing you of scamming anyone, but I know that the phone in this auction is certainly NOT an iPhone.
I don't know what GSM is but I been using it with my tmobile SIM card but when you pop my SIM card out it say Verizon in setting, so yes I guess it is GSM unlock