Microsoft Dynamics GP 2015 RTM introduced PowerShell which can be used for a number of administrative purposes. To use the supplied cmdlets, Microsoft Dynamics GP PowerShell needs to be installed from the downloaded media.
Once you have the media downloaded, run the setup utility and, under Additional Tools, select GP PowerShell:
On the Welcome screen click on Next:
Accept the terms of the License Agreement and click Install:
Once installation is complete, click Finish: