title: Using code with the GPL v3 licence
body: <p>I'm currently reading through this book Beginning Android Games by Mario Zechner and he has provided many base framework classes for games in his book. He also states that the source code is licensed under the GPL version 3. What does this mean for me if I wish to develop and release a game using his provided framework classes?</p>
  
  <p>Thank you.</p>