It maybe inadvertently deleted from your HomeScreen
to returned do the following steps..
1) Make sure the phone is in Home screen >Tap the
default apps icon aka=Also known as apps drawer
> >Tap+Hold-down the default apps icon
and dragged to Home screen-Bye
Another way to return the icon is Uninstall & Reinstall
mygmc app to do that ; Open settings >apps and
Tap on apps manager >Find the mygmc app icon
and Tap on it >next Tap on [Uninstall] then goto
Play store and reinstall the app; The icon is back