Vino is a VNC server which is installed by default on Ubuntu (Debian family). Is there a VNC Server installed by default on Red Hat, is it the same?
vino only, if you don't find, install it using:
# yum install vino
If you encounter a problem doing so with
yum, then try to configure registering it:
Of course if you have RHEL licensed, otherwise try creating your own repository.
As an alternative, you can also find vino packages on your RHEL media, installing it using this simple
# rpm -ivh vino-<version>.rpm
If you cannot find there, download it from rpm.pbone site.