As it is now GOG launches all macOS games in Intel compatibility mode which drastically reduces performance and results in 20-80% lower FPSs. To bo clear, this is not about the GOG Galaxy client itself running in native Silicone mode which I don't care much about. This is about how it launches games.

Can we please have GOG correctly launch Universal games? It has been three years since Apple launched its first laptops with Apple Silicon / M1 chips, so it is high time that GOG supported it.

Ah, this probably also explains why Vagrus launches from Galaxy but won't launch just by double-clicking on it on my M1 machine.

And why the folks who wrote it, who only have one (Intel) Mac mini to do Mac testing on at all, can't reproduce the problem.

It doesn't require a separate GOG client build or anything, the client itself can remain Intel-based. The only thing they need to do is make a minor change in how they launch game processes.