On June 1, Microsoft announced the release of Dynamics GP 2015 R2 and it brings a host of new features and abilities.
Checkout A Beginner’s Guide to Microsoft Dynamics GP 2015 R2 at MSDynamicsWorld.com
A Beginner’s Guide to Microsoft Dynamics GP 2015 R2 – MSDynamicsWorld.com
Off-Topic & MiscellaneousGP 2015
Archived post from 2015. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.