Okay, it has been a long time since I last sent a suggestion here.
I was wading through the Final Fantasy VI hack sections for both the SNES and GBA versions and realized that almost nothing is related to changing how Gau learns his Rages. All I found was, on the SNES, an expansion to Gau's Rage and Relm's Sketch, and the fact that Brave New World shortened Gau's Rage command count to 64.
What I wanted to know if there isn't some means to make the whole learning process for his Rages (Which, due to massive randomness, may take hours upon hours upon hours and suck the entire fun out of the game due to how bad a case of padding it is) easier or at least way less random, making life easier for completionists or just those who like Gau. And of course, if such a maneuver could be applied for both versions of the game.
Well, it doesn't kill to leave the idea floating around.
There's the learnable Rage hack - https://www.romhacking.net/hacks/1371/