C:\Users\ \AppData\Roaming\Goldberg SteamEmu Saves\ .
If $XDG_DATA_HOME was defined, it hid at $XDG_DATA_HOME/GSE Saves/ . The Secret Shortcut: Portable Saves goldberg emulator save location
In most cases, the Goldberg Emulator stores save data in the folder of your Windows user profile. This is the "global" storage area for the emulator. The standard path: C:\Users\ \AppData\Roaming\Goldberg SteamEmu Saves\