What is “Gapps”?
“Gapps” stands for Google Apps, and encompasses most of the Google apps on your device such as Gmail, Calendar, the Play Store, Hangouts, and Google Plus.
So it’s not terribly helpful when you get the message that Gapps has stopped working because it could entail any of the above apps as well as Google Play services.
Clear Data Cache for Google Apps, One by One
So what is solution for this error? Even if you’re getting this message constantly, your phone should still be sort of usable, so you should close the notification and try to get to “Settings -> Apps or Application Manager” on your device. If the notification keeps popping up, just keep closing it and try to stagger on over to the Apps list.
Once you get there, scroll down to “Google Play services,” which from experience is the most volatile of the Google apps and most likely to be the culprit for the message.
If you’re still getting the message, then try the same process you just carried out on the other Google Apps – Google Play Store, Gmail, Maps, Calendar and Google+ – clearing the cache of each app till the problem stops.
If that fails, then uninstall the updates for Google Play services. you can found in the App info section of the app, accessed from the Apps list under Settings.
Reset App Preferences
Perhaps you disabled something you shouldn’t have at some point, or some of the default settings of one of your Google Apps have gone out of whack. An alternative possible fix is to reset all your apps preferences in one fell swoop. This doesn’t reset any of the data on your apps, but under the hood it gets them back to the state they were in when you first got your phone.
To Reset app preference, go to “Settings -> Apps or Application Manager,” then tap the menu icon at the top-right and select “Reset app preferences.”