Entrance condition:

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

Requires:

"Morph",
{"or": [
  {"and": [
    "Gravity",
    {"or": [
      "HiJump",
      "canWallJump",
      "SpaceJump",
      "canIBJ",
      "canSpringBallJumpMidAir",
      "canSpringBallBombJump",
      "canGravityJump"
    ]}
  ]},
  {"and": [
    "canSuitlessMaridia",
    {"or": [
      {"and": [
        "HiJump",
        "canSpringBallJumpMidAir"
      ]},
      "canUnderwaterWallJump",
      "canUnderwaterBombIntoSpringBallJump"
    ]}
  ]},
  {"and": [
    "h_navigateUnderwater",
    "canTrickyUseFrozenEnemies",
    {"ammo": {"type": "Super", "count": 1}},
    {"or": [
      "canInsaneJump",
      "Spazer",
      "Wave",
      "Plasma",
      "HiJump",
      {"ammo": {"type": "Super", "count": 1}}
    ]}
  ]}
]}

Dev note: Direct G-mode will have an open door and Samus will fall. Indirect will require a doorlock bypass in the room below. FIXME: A direct G-mode regain mobility and fall through the door would be possible if entering on the right side of the door, but there is not a way to represent that yet.