Welcome to Android Central! I assume you're referring to the
Gtunes Music app, and you want to know how to transfer your downloaded music to a new phone, correct? I'm not familiar with Gtunes, but I assume that it has its own folder for downloaded music. So plug the Razr Maxx into your computer via USB, and use the computer's file explorer to search the various folders for the music files. Then drag and drop them all to the computer's hard drive. Now plug the new Droid Maxx into the computer via USB, and do the reverse. Make sure to copy it over with the same folder hierarchy, and in the same main folder as on your Razr Maxx.