The GP team is gearing up for the release of R2 for GP 2015. With that comes the Microsoft Dynamics GP 2015 Upgrade Blog Series Schedule!!
Microsoft Dynamics GP 2015 Upgrade Blog Series Schedule!! – Microsoft Dynamics GP Community
Microsoft & the GP EcosystemInstall, Upgrade & AdminGP 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.