I think there is a possibility to have a local client using Gmail, with a rule set to delete mails on Gmail as soon as they are synced locally. So in this case Gmail would be nothing more than a relay/proxy, while your mails would actually be offline.
It’s literally a fork. Open some files, they are exactly the same. Someone just exported easy notes and then uploaded it again with different icon and name so people won’t immediately see it’s a fork.