Andy from the GP support team covers some of the New General Ledger Features for Microsoft Dynamics GP 2013 R2!
New General Ledger Features for Microsoft Dynamics GP 2013 R2! – Dynamics GP Support and Services
General Ledger & FinancialsGP 2013
Archived post from 2014. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.