It should be possible to link to GUI libraries implemented in C, like Gtk+.<p><a href="https:&#x2F;&#x2F;github.com&#x2F;apple&#x2F;swift-package-manager&#x2F;blob&#x2F;master&#x2F;Documentation&#x2F;SystemModules.md" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;apple&#x2F;swift-package-manager&#x2F;blob&#x2F;master&#x2F;D...</a>