This is the core of your search. The installation process for GOG version v30726 is different from Steam. GOG uses offline installers—usually broken into multiple .bin files and a .exe launcher.
Since this is a GOG DRM-free package (no launcher required), installation is straightforward:
Absolutely—but for specific reasons.
If you want the simplest experience, the Steam version auto-updates and handles DLSS versions for you. But if you are looking for the definitive, archival, DRM-free copy of the best-looking ray-traced game ever made, Metro Exodus Enhanced Edition v30726 on GOG is the holy grail.
The installation, while requiring more manual attention than a storefront, guarantees that 10 years from now, when servers are silent, you can slot in an SSD, run setup.exe, and journey through the radiation-flooded tunnels of Moscow again. metro exodus enhanced edition v30726gog install
Final Checklist for a successful install:
Now, turn off the lights, put on your headphones, and remember: The world has ended. Your install hasn't. This is the core of your search
Have a specific error code for v30726 not listed here? Check the GOG Community Forums under the "Metro Exodus Enhanced" subsection—many users have archived fixes for this exact build.