add Gnome GUI to Linux minimal

Install Gnome GUI on CentOS 7 / RHEL 7
http://www.itzgeek.com/how-tos/linux/centos-how-tos/install-gnome-gui-on-centos-7-rhel-7.html#axzz3Yzdqta32

[SOLVED] CentOS-7 “Minimal Desktop” installation GNOME
https://www.centos.org/forums/viewtopic.php?f=47&t=47088

My way of building a minimal desktop on RedHat based systems
http://srobb.net/minimaldesktop.html

CentOS 7 – Minimal Desktop Installation
http://www.dokuwiki.tachtler.net/doku.php?id=tachtler:centos_7_-_minimal_desktop_installation