Annoyingly the Group Policy Management Console (GPMC) is not available with the Remote Server Administration Tools feature. Here’s how to install the GPMC in Server 2012 R2… You have to install the Group Policy Management feature! Simple and obvious, but not when they separate the GPMC out from the RSAT feature :s
To install the GPMC, go to Server Manager, add roles and features, keep clicking next to get to the list of features (after the list of roles) and it’s just called Group Policy Management. Tick the box and keep slamming the Next button.
After the GPMC is installed, you can access it from the start menu or by typing mmc at the start menu and adding the group policy management add in.