You may turn off syncing notes by going to Settings > Mail, Contacts, Calendars or iCloud and selecting the email address you created.
It’s not a Gmail issue, because the data is simply transferred from the Notes app (ifn notes instructs you to delete everything, Google obediently does so). It’s just a “container” for the notes app. A handful of people have been able to restore their notes using an iCloud backup (or similar)
On an iPad or Android device, go to the Settings app. Tap Mail, Contacts, and Calendars. On older phones, this may be called “Mail, Contacts, and Calendars.” Accounts will be displayed. Select the account you wish to unlink from Notes. Unlink your notes by turning off the switch next to them in the Notifications menu.
Open the Gmail app and verify you’re signed in to the appropriate Gmail account. In the top left, tap the three-lined icon. Then scroll down and select “Notes” from the drop-down menu labeled Labels. All of your notes from the Notes app should be displayed here.
Notes may be added in Gmail Messages, which is compatible with Google’s other note-taking services. This feature is also accessible on mobile devices through the Gmail app. You’ve probably seen these notes before:Inline notes are convenient for making brief comments or as a to-do list for yourself or others using Gmail. Here’s where things start to get really interesting: When you reply or forward an email with your own thoughts, a box will appear and ask if you want to include your ideas in your outbound message.