Ok Thanks now i know how to move the stop but doesn't matter where you move the stop the parking position can't be remember
I'm not really sure what you are trying to say here but, I assure you the parking position is saved in the GSX parking customization file so, it will loaded on the next session.
. Btw why is not possible to move the stop position left n right?
What would be the point ? If you have a skewed parking, the stop position will change the lateral position by rotating the Parking system.
Also you got this wrong (The thing you said don't know what it does, is the position/rotation of the Parking *itself*, which could be accessed by clicking the "Edit Parking" button or cycling until you get there) That thing has nothing to do with parking because for the rotation of the parking is located in the middle of the aircraft.
This sentence is not very clear, same as you original post but, from the screenshot you posted, it seems you were expecting the stop position to be movable, when you were editing the Parking *itself*, instead of the Parking System. Otherwise you wouldn't said "does anyone here have any idea how to move the stop mark, or is something that gonna be fix in the next update?"
That's why I replied with "there's nothing to fix": because your only problem (as seen in your screenshot), was you were editing the wrong object.