Right-click or hold Control and click the Google Drive application. Select “Move to Trash” in the shortcut menu. Note: If you receive a message that the application is still running, click the Google Drive icon in the menu bar, select the gear icon, and choose “Quit.”. Then, uninstall the app.
Link: https://www.howtogeek.com/803611/uninstall-google-drive-windows-mac/