You can export your contacts from Gmail by:
Signing in to Gmail
At the top left, click “Gmail > Contacts”
Click “More > Export”
Choose whether to export all contacts or only one group.
Select the CSV format option to export your contacts’ information.
Click Export.
Choose Save to Disk > OK
Select a location to save your file, and click OK
See also:
Tips for preparing your data before importing into Wealthbox