This is a difficult question to answer as it depends on a number of factors, such as the size of your gaming setup, the type of you choose, and your personal preferences. However, as a general rule of thumb, you should allow for at least 2-3 feet of space around your gaming desk so that you have plenty of room to move and play. If you have a larger gaming setup, or if you plan on using multiple monitors, you may need even more space. Ultimately, it is up to you to decide how much space you need for your gaming desktop.