I can see the benefits, but I doubt it would be that simple. The Go code you decompiled would depend on a Go runtime. That specific Go runtime would then have dependencies on OS libraries. So for example, when you open a file in Go, I'd imagine that this functionality is built on top of the file handling functionality of Windows/OSX/Linux. You could work around these dependencies, but it's probably less hassle to port the Go runtime to the new OS.
If you decompile the compiled Go program into C, it'd still have the references to API calls like this. These APIs would have to be implemented on the new OS for the decompiled program to work without modification.
