Re: unfortunately google keyboard has stopped
There recently was an update announced for the keyboard, but I am still on version 4 from May 16th. Has yours been updated recently?
When I have apps that display that message I uninstall the updates for them and let it update itself again. Sometimes when a device has a few app updates and it tries doing them all at once, they get stuck, etc.
See if that helps.
Is the keyboard that came by default on the device or did you add it on afterwards?