X11 GUI via SSH in CentOS 6 / RHEL 6

Enable X11 forward in Putty in local machine.

Install Cygwin in local machine and Open Xlaunch. use the following settings. Click all Next and close.

Launch the Putty session and connect to remote linux machine.

[root@test ~]# echo $DISPLAY
localhost:10.0
[root@test ~]#  xclock

Now gui Open a XWindow in your local machine.