Switching to a GUI in Ubuntu is a relatively simple process that can be completed in just a few steps. First, you will need to open the Terminal. You can do this by pressing Ctrl+Alt+T on your keyboard. Once the Terminal is open, you will need to enter the following command: sudo apt-get install ubuntu-desktop. This command will install the necessary files for running a GUI on your system.
Once the installation is complete, you will need to restart your computer. After your computer has restarted, you should now see the Login Screen. From here, you can login with your username and password. Once logged in, you should now see the Unity Desktop Environment.