Yes, it is possible to migrate emails from Gmail to Zimbra.
This can be done through the IMAP migration tool in Zimbra. With IMAP enabled on your Gmail account, you can use the Zimbra migration wizard to transfer all your emails, contacts, and calendar items.
Keep in mind that it may take some time depending on the size of the email data you have in your Gmail account. Also, ensure you have your Gmail username and password handy for this migration.
Always remember to double-check everything after the migration to ensure that all your emails have been successfully migrated over.
