This is a simple image gallery I created in my tutorial.

YouTube Tutorial: 

Version 2 can be found at this link: https://zeillearnings.itch.io/image-gallery-v2

Scope

• Add an "Album" button on the Main Menu
• Show locked and unlocked images on the gallery screen
• Show a CG in script.rpy
• Unlock Images in script.rpy

How this works:

There's an Album button on the main menu. You can click that and it will lead you to the gallery screen. That code is found in screens.rpy line 315.

if main_menu:
    textbutton _("Album") action ShowMenu("album")

The other explanations can be found in the code's script.rpy and gallery.rpy 

Free. No credits needed.