No. Please don't. Contribute to something like Heroic Launcher instead. Don't create something new just for GOG. Help make the existing tools better. It'll mean GOG has to do less work, and the programs people are already using will get better. Or even just sponsor Heroic so they can send more time we can working on it themselves.
They're not creating something new. They're taking their existing tool (which - for all its flaws - is still far ahead of Heroic in many ways), improving it further, and changing it to also work on Linux.
If they then go add additional features like wine integration to that tool to make it overlap more with Heroic is something we're all assuming, but not actually a given.
If its open, heroic can include their code or solutions, as they do with proton. Rising tide lifts all boats.
Alternatively, work on developing protocols for game launchers instead. Get the Heroic Launcher devs and devs from other launchers to work on a common interface.
> It'll mean GOG has to do less work
[citation needed]
GOG's launcher team is presumably already familiar with their codebase, already has a checkout, already has a codebase that's missing 0 features, has a user interface that already matches their customer's muscle memory, and presumably already has semi-decent platform abstraction layer, considering they have binaries for both Windows and OS X. Unless they've utterly botched their PAL and buried it under several mountains of technical debt, porting is probably going to be relatively straightforward.
I'm not giving Linux gaming a second shot merely because of a bunch of ancedata about proton and wine improvements - I'm giving it a second shot because Steam themselves have staked enough of their brand and reputation on the experience, and put enough skin in the game with official linux support in their launcher. While I don't have enough of a GOG library for GOG's launcher to move the needle on that front for me personally, what it might do is get me looking at the GOG storefront again - in a way that some third party launcher simply wouldn't. Epic? I do have Satisfactory there, Heroic Launcher might be enough to avoid repurchasing it on Steam just for Linux, but it's not enough to make me want to stop avoiding Epic for future purchases on account of poor Linux support.
Why they shouldnt develop version over which they have full control?
Agreed, I don't want yet another launcher.
And as the underdog it even makes sense for GOG to fully embrace cross-store launchers.
Meh, I use Lutris instead of Heroic.
I am happy that GoG will finally make its launcher available to Linux.
GNU/Linux gamers are always decrying GOG, saying they won't buy stuff from them because Galaxy doesn't run on GNU/Linux, now we're getting people saying GOG porting Galaxy to GNU/Linux is bad!? By Taranis, GOG just can't get a break, can they?