why do you need a gallery save? Just start a new game, go to options > Cheats > code: fkfynroh > unlock all scenes
IIRC the gallery unlocking is kinda glitchy. Once unlocked, some of the scenes' order are changed, or it disappears*; so it's kinda better to unlock them all yourself (or use someone's save).
(just checked by resetting & unlocking again)
Plus, the code only unlocks the 1st image. If you click it to enlarge and click to see the variations it gives you blanks.
Ps. Was going to try manually unlocking the gallery but didn't have time.
But list of what I remember:
1. Ero: page 3's last two slots (Some Zeyphra stuff)
2. Scene: Aire's rape> this one is just plain broken, since I tried unlocking it manually & it didn't appear, while the unlocker plays the seduction one.
New: 3. Ero: pg 2>row3, #2; Cali's bad route should have unlocked the 4th image, but only first 3 were unlocked after the scene
Edit: Yeah, gallery unlocking is glitchy -- even if you try to manually unlock it -- so it's probably better to just not bother till it's fix.