Yes, this has been asked before, but neither really addresses my concern, and I don't have reputation enough to add comments to existing questions.
I've bought the cheapest Android 4 tablet with Google Play that I could find to have a device in the kitchen that syncs the family members schedules and displays them all in one place, edit shopping lists that sync with my mobile, shows the recipe I'm following while cooking etc.
As all family members are going to use it, I want syncronization of calendars, and I want to use my Google-account for which I have already purchased apps for my phone as the Google account in Google Play on the tablet, but I do not, however, want the whole family to be able to access my email. So how can I turn off Gmail access?