Tamago-DB can import Gmail contacts records if they are first exported as an Outlook-compatible CSV file.
Sign in to Gmail and select Contacts from the upper-left drop-down menu.
Click More > Export from the drop-down button at the top of the page.
Under Which export format? choose Outlook CSV format (for importing into Outlook or another application). Click Export to save.
See the CSV Import File Format solution for details on supported columns when you are ready to import.