Yes! Finally, GOG is working on Heroic and in a great way, even though we are considering it in a beta stage, it's actually pretty stable and supported on all 3 Platforms with support for Native games on Linux and macOS!
Check the Full Changelog to see what is supported and what are the current limitations:

Features for GOG games

• Downloading games using Galaxy API (Windows and macOS)
• Downloading games using offline installers (Linux)
• Ability to pick a game language for games that support it
• Downloading game DLCs (might not work properly with old V1 Depots)
• Ability to run native Linux games using Steam Runtime Scout (fixes issues with Baldur's Gate libssl not found error) Requires Steam

General features

• From now on at least one account is required (you don't have to use GOG or Epic if you don't want to 😃 )
• Added "runner" (game store) indicator on GamePage

Screenshots

• Library Page

• Account Manager page

• Runner Indicator
  
  

Notes

• If somebody ever finds a game that uses V1 Depots and contains DLCs please open an Issue or contact us on Discord.
• For Windows and macOS ETA can show very large numbers, it's due to the current way of dealing with decompressing files after each file is downloaded (will try to separate it between threads in the future)
• Games that rely on Galaxy SDK for core features (like authentication to play) are not supported, for example: Gwent - I suggest getting a Steam version if the game is F2P and available there. (please report other games with that kind of stuff)
• Cloud Sync for Mac and Windows GOG games is planned for the future (we don't know much about it yet if somebody wishes to help with that reach out to us on Discord). That feature isn't currently possible for Linux native games due to a lack of support on the GOG side

Other changes and Fixes:

• [General] Beta-Feature: GOG implementation by @imLinguin in #872
• [General] Fix Reset Heroic + Update Electron by @flavioislima in #995
• [General] Add GOG store link on Sidebar by @flavioislima in #997
• [General] Offline mode only toggleable if allowed by @Nocccer in #970
• [General] Enable useUnknownInCatchVariables to forbid log calls with catch variables of none type string by @Nocccer in #998
• [General] Fix option check for update on startup by @Nocccer in #980
• [Windows] Fix creation of log file by @Nocccer in #979
• [Mac] Better Mac Installer by @olek-arsee in #960
• [Windows] Fixed manifest-path creation for EGS sync by @Nocccer in #983
• [Fix] External URLs not opening by @imLinguin in #994
• Translations update from Hosted Weblate by @weblate in #988
• Updated Electron to v17.0.1

New Contributors

• @olek-arsee made their first contribution in #960
• @CommandMC made their first contribution in #969
• @Depal1 made their first contribution in #992

Full Changelog: v2.1.1...v2.2.0