The gate will not spawn in indirect G-mode and is freely passable. It is possible to exit G-Mode while under the gate to open it without a Super. A normalized method to do this, is to jump into the right-most pit before the gate, Samus will barely be visible behind the bottom right door. Jump and land on the corner and face left, moonwalk to the right with no beams equipped and stop moving immediately as the 11th shot fired is heard. To fix the camera afterwards, go to the left end of the room and fall back to the bottom of the room. Alternatively, get into the left-most pit, jump slightly to the right, move over one tile, then jump. If the camera is not fixed, move to the right a bit more and jump again.