It is actually relatively easy to burn GameCube games and is a popular process that is searched by gamers who wish to back up their games. Backing up games is also a popular method because copying games onto a computer is a lot harder to do. In order to do this, you will need a rewritable DVD and the correct .iso file that will actually allow you to do the backing up process.
The first thing that you should do is download the .iso file that allows you to burn GameCube games. A simple Google search for this should provide you with a number of websites that allow you to download this file.
You should be using a computer or laptop that has a CD drive slot that you can insert your blank rewritable DVD into drive. Without doing this you will obviously not be able to burn your games.
The next thing you should do is get Alcohol 120% up and running. If you don't already have this program on your computer then you can visit their website and download a trial of the program to use that in the meantime.
Once you have downloaded and opened Alcohol 120%, you should click the 'Image Burning Wizard' which should be listed in the menu on the left hand side. When you click on this a new window will be opened and you will be asked to select your file. Find your .iso file, select it and then click 'Next'.
Check all the setting that are listed for your burn to see that they are all correct but you shouldn't need to change much. Once you are sure they are correct, click 'Start' and the .iso burn will begin. The burning process will start and once it is complete, the game will be burned onto your blank DVD.
