yum groupinstall "Server with GUI"

yum install tigervnc-server -y

/sbin/setenforce 0
sed -i 's\SELINUX=enforcing\SELINUX=disabled\' /etc/selinux/config
systemctl stop firewalld.service 
systemctl disable firewalld.service

cat /etc/tigervnc/vncserver.users 
# TigerVNC User assignment
#
# This file assigns users to specific VNC display numbers.
# The syntax is <display>=<username>. E.g.:
#
# :2=andrew
# :3=lisa
:1=root

vi /etc/tigervnc/vncserver-config-defaults 
geometry=2000x1200
session=gnome

systemctl daemon-reload
systemctl enable --now vncserver@:1.service

systemctl restart vncserver@:1.service