1. You are allowed to use GPL code in a closed source application. If you distribute that application, you must release the source code to the entire applicati

1. You are allowed to use GPL code in a closed source application. If you distribute that application, you must release the source code to the entire application under the GPL. How is that different? If you're making something for internal use at your company, it means that you don't have to give back. If you are distributing it to users that are not yourself (or your company), you must make it GPL. 2. You cannot relicense code under different licenses unless the license explicitly says that you can. The GPL doesn't have such a provision.