GP 2016 R2 is now loose. Start scheduling your upgrades.
Microsoft Dynamics GP 2016 R2 Released! – Microsoft Dynamics GP Community
Microsoft Dynamics GP 2016 R2 Released! – Microsoft Dynamics GP Community
Microsoft & the GP EcosystemGP 2016
Archived post from 2016. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.