To install a graphical user interface (GUI) on Fedora, you have a couple of options. The most common GUI for Fedora is GNOME, but you can also install other desktop environments if you prefer. GNOME on Fedora:

1. Start by opening a terminal. You can do this by pressing Ctrl+Alt+T or by searching for "Terminal" in the application launcher.

2. Update your system's packages by running the following command:
```
sudo dnf update
```

3. Install the GNOME desktop environment by running the following command:
```
sudo dnf groupinstall "GNOME Desktop"
```

4. During the installation, you'll be prompted to select the default display manager. The display manager is responsible for managing the login screen. You can choose either `gdm` (GNOME's default display manager) or `sddm` (Simple Desktop Display Manager). Use the arrow keys to select your preference, then press Enter.

5. Once the installation is complete, reboot your system by running:
```
sudo reboot
```

6. After the system restarts, you'll be greeted by the login screen. Click on your username and enter your password to log in.

7. Fedora should now start with the GNOME desktop environment. If you're using Fedora 34 or later, you'll notice a new "Welcome to Fedora" window that will guide you through the initial setup of GNOME.

That's it! You have successfully installed the GNOME desktop environment on Fedora. If you prefer a different desktop environment, you can substitute "GNOME Desktop" in step 3 with the name of the desktop environment you want to install (eg, "KDE Plasma Desktop " for the KDE Plasma desktop environment).