Can Gmail be uninstalled on Android 5.1.1 (Lollipop)? Somehow the Gmail app has disappeared from my new Android phone (Motorola Moto G 3, Android 5.1.1 Lollipop).

I thought it was impossible to uninstall Gmail so I suspect a hardware failure or an Android bug.

A previous thread says that Gmail can not be uninstalled on KitKat:

How to (cleanly) remove Gmail app from KitKat? I have fully moved over to Inbox

But can Gmail be removed from Android 5.1.1 (Lollipop)?

UPDATE: To avoid confusion here perhaps I should add that I can not find Gmail in Google Play under "Installed" apps and not in "Settings -> Apps -> All".

UPDATE 2: Today Gmail is back on my phone. (Yes, I am sure it was not there.) So I guess this was the automatic uninstall + reinstall that Android uses when there seem to be some problem with an app. However I am not sure why this happened. It can be hardware problem or a bug in Gmail that was hit because of my huge amount of mail messages. Is there some way to get information about this from Google/Android?
If it's built into Android as a system app (built into the system, uninstallable by normal means), no, not unless you have root or unless your device has some rare functionality which will allow you to (I don't even know if such a device exists). If it's an app you installed yourself and isn't a system app, then yes.