Yes, direct GL access with a thin app delegate is the most common way C++ game engines like Unreal Engine, Crytek, and Marmalade are packaged for iOS and Android. There's no reason you couldn't do that in Go too, except for the lack of other libraries like scripting, mesh, etc.

I'm not talking just a simple GUI abstraction wrapper, which has earned a deservedly bad reputation. The more full-fledged UI models have gotten much nicer, like in React Native or Xamarin.