FYI: I still haven't messed with Gizmo. I did translate most of Saint Tail though, and I'm now putting the finishing touches on the last of the text for the Rayearth RPG on Game Gear.
In the interim, I dumped scripts for the rest of the Madou Monogatari games on the Game Gear; Madou Monogatari A - Dokidoki Vacation, Madou Monogatari II - Arle 16-Sai, and Madou Monogatari III - Kyuukyoku Joou-sama.
I made a short series of YouTube videos on dumping the script for Madou Monogatari III if you want to see what I did for any reason. I wasn't able to edit these in my video editor, so they're a little raw, but it goes to show that it doesn't take too long to do some of this work, assuming the game is cooperative.
Dumping a Script Part 1 - Relative Searching (Madou Monogatari 3 Game Gear)
https://youtu.be/2WqNpYMuv1IDumping a Script Part 2 - Making a Table File (Madou Monogatari 3 Game Gear)
https://youtu.be/hXf94nZbxVcDumping a Script Part 3 - Finding text in the ROM (Madou Monogatari 3 Game Gear)
https://youtu.be/5njQLzNPgCQDumping a Script Part 4 - Dumping and formatting text (Madou Monogatari 3 Game Gear)
https://youtu.be/iyqp1HxHMXwDumping a Script Part 5 - Dictionary Compression (Madou Monogatari 3 Game Gear)
https://youtu.be/qNsQWNH_Epc