Microsoft Dynamics GP 2016 was released May 2016. Dynamics GP 2016 R2 was released December 2016. Here is a quick list of all the resources you need:

Microsoft Dynamics GP 2016 System Requirements PDF

What’s New in Microsoft Dynamics GP 2016 PDF PDF

What’s New in Microsoft Dynamics GP 2016 R2 PDF PDF

Microsoft Dynamics GP 2016 R2 Functionality Guide PDF

Microsoft Dynamics GP R2 Reasons to Upgrade PDF

Microsoft Dynamics GP 2016 Software License Terms PDF

Features Since Microsoft Dynamics GP 2013

Microsoft Dynamics GP 2016 Blog Posts

See what is new since Microsoft Dynamics GP 2013

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