It is that time again, time to think about year end in GP. Microsoft Dynamics GP Year-End Release 2015: General Ledger
Microsoft Dynamics GP Year-End Release 2015: General Ledger – Microsoft Dynamics GP Community
Year-End & 1099General Ledger & FinancialsMicrosoft & the GP Ecosystem
Archived post from 2015. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.