If you’re looking to sync only contacts between iPhone and Google, and don’t want to use the free Google Sync wireless service, use the built-in sync feature in iTunes. The latest versions of iTunes have the option to do a USB sync of Google contacts with iPhone.
If you’re looking to do a USB sync of Google calendar with iPhone, CompanionLink can help.
USB sync of Contacts between iPhone and Google was last updated January 13th, 2010 by