Jump onto the crumble blocks to make them solid, then use them as a platform to cross the room. In indirect G-mode, stand where the gate will spawn and exit G-mode to open the gate. In direct G-mode, overload PLMs by shooting the gate then position Samus a few pixels away from the gate to where upward diagonal shots go through it. Crouch then shoot diagonally and quickly exit G-mode (3-7 frames later) to open the gate on G-mode exit.

Entrance condition:

{
  "comeInWithGMode": {
    "mode": "any",
    "morphed": false
  }
}

Requires:

"h_heatedGMode"
{
  "or": [
    "ScrewAttack",
    "h_usePowerBomb",
    {
      "ammo": {
        "type": "Missile",
        "count": 2
      }
    },
    {
      "ammo": {
        "type": "Super",
        "count": 1
      }
    }
  ]
}
"canIBJ"
"canBombHorizontally"
{
  "heatFrames": 35
}

Clears obstacles: A