CentOS is a Linux distribution that provides a free and open-source community-supported computing platform, functionally compatible with its upstream source, Red Hat Enterprise Linux.

How to Install GUI on CentOS 8 Minimal Linux Server

GNOME is a free and open-source desktop environment for Linux operating systems. GNOME was originally an acronym for GNU Network Object Model Environment, but the acronym was dropped because it no longer reflected the vision of the GNOME project. 

Step 1. Update System Packages

 dnf update -y

Step 2. List available environment groups

Check package group list for GNOME GUI Packages:

# dnf grouplist

Example output:

# dnf grouplist
Available Environment Groups:
   Server with GUI
   Server
   Workstation
   KDE Plasma Workspaces
   Virtualization Host
   Custom Operating System
Installed Environment Groups:
   Minimal Install
Installed Groups:
   Container Management
   Headless Management
Available Groups:
   .NET Core Development
   RPM Development Tools
   Development Tools
   Graphical Administration Tools
   Legacy UNIX Compatibility
   Network Servers
   Scientific Support
   Security Tools
   Smart Card Support
   System Tools
   Fedora Packager

Step 3. Installing Gnome Desktop environment

If you intended to install Gnome GUI then under the available environment group you can see two packages:
“Server with GUI” and “Workstation“.
Those have installed the command-line server environment, use this command:

# dnf groupinstall "Server with GUI"

However, for workstation deployment use this command:

# dnf group install "Workstation"

Step 4. Set system to Graphical mode

Execute the following command if you want to boot your system in GUI mode-

# systemctl set-default graphical

After that restart your system

# reboot