[usrbinbash]

IMO, it's because the primary use case for Go isn't GUI programming.

The language absolutely is a generalpurpose language, and making great GUI libs with it is certainly possible, as shown by Fyne (yes, I know it's still new, give it time).

That being said, most people using Go build server side code and frameworks with it, aka. things that live as daemons in some rack or in a docker swarm. If there is an front-end to these kinds of applications, it's usually web based.