Jay Manley announces that there are New Data Migrations supported in Rapid Migration Tool for Dynamics GP 2010
New Data Migrations supported in Rapid Migration Tool for Dynamics GP 2010 – Inside Microsoft Dynamics GP
Off-Topic & MiscellaneousGP 2010
Archived post from 2012. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.