I explored couple of methods to develope desktop/mobile GUI with Go a few weeks ago. These are some of them:
1) Fyne (https://github.com/fyne-io/fyne)
Popular. Native functionalities like trays, etc. Mobile app possible. Looks okay.
2) Gio (https://gioui.org/)
Looks okay. Customisable. Tailscale Mobile app is made with this.
3) Wails (https://github.com/wailsapp/wails)
Easy WebView for Go.
Lacks native functionalities.
4) Sciter (https://sciter.com) embedded in Go
Haven't explored much.
5) Giu (https://github.com/AllenDang/giu)
Based on Dear ImGui. Doesn't look very polished.
P.S. I settled on Gio for the mobile app and ditched the desktop app altogether.