Nintendo - Game Boy / Color (Gambatte) configuration


I wanted to emulate GameBoy - DMG games properly and I like the green color pallete.

I downloaded Gambatte and modified the launcher for GameBoy games and everything works fine.

LAUNCHER=retroarch -L
TITLE=GameBoy Roms

On this page I found settings for GB Colorization and palettes:

Internal Palette: GB - DMG - this is the closest example to what I’m looking for.

But I’m looking for help, how to set variables like:

gambatte_gb_colorization = "internal"
gambatte_gb_internal_palette = "GB - DMG"

Or even my custom one. I don’t see any specific configuration file for the new RetroArch core.

Can someone please help me with the solution?