As you know, Palestinians with a Gaza ID are not permitted to be in the West Bank, and vice versa (unless you have a special permit from the military, which are notoriously difficult to come by).
Como sabes, a los palestinos con ID de Gaza no se les permite estar en Cisjordania, y viceversa (a menos que tengan un permiso especial de los militares, que son notoriamente dificiles de encontrar).