Ok this is the LOG i'm now stuck with the aircraft ready to pushback and with the marshaller stopped in front of me that doesn't move...I've tried to take off and put again chokes, parking brake...everything...but i'm stuck here.
Please clarify what do you mean with "the aircraft ready to pushback and with the marshaller stopped in front of me".
The marshaller is not supposed to come in front of you, it will appear on the left/up side of the parking spot, and will walk towards the airplane front gear. What he'll do next, depends if the tow truck type (towbar or not), but you must try to be more precise and say exactly at which stage the marshaller stopped. Has he even started walking ?
Your log only shows you removed parking brakes when you shouldn't have to, and GSX told you that, nothing else.
There was just ONE other user that has reported a weird problem like this, and he said the marshaller started to move after pressing ESC twice, to go back to the ESC menu options and back again to flight.