Import PST file to Gmail -shoviv@import-pst-to-gmail
Get transfer/upload/import PST file into Gmail account using an excellent software solution known as Shoviv tool for Imap Mailbox [Backup and Restore]. This features embedded tool allows you to schedule your backup jobs and has a by default incremental export option for every mailbox. Get a free trial of the tool and check out whether its works for you or not.
Note: The trial version allows and works its features only for 50 items in each folder.