Task: In the Calendar app, turn on the Show event from Gmail setting so my events can't be synced directly from Gmail.
Steps:
Click on the cross at the top left corner of the screen.
Click on the menu icon at the top left corner of the screen.
Click on the setting option at the bottom left corner of the screen.
Click on the Events from Gmail option on the screen.
Click on the toggle button on the right side of the show Events from Gmail option on the screen. 
Click on the OK option on the bottom right corner of the pop-up screen.