Zimbra to Gmail Converter Features include:

• This software move Zimbra files to Gmail as well as other file types like PST, MBOX, EML, EMLX, HTML, and PDF, among others.
• This commercial tool additionally move Zimbra item to Gmail, G Suit, Google Drive and so on.
• This tool transfer corrupted files securely.
• This tool also move calendar and contacts from Zimbra TGZ to a Gmail account.

More details: https://www.kdetools.com/zimbra/gmail/