Streetdaddy, you should be OK now that you've added your G drive files to the library. Gigi's advice concerning the Consolidate Library command was a little off target. It's possible to have music files that are scattered all over different drives in your music library. The library is a data base that keeps track of where the files are. The Consolidate Library command makes sure a copy of all the tunes in your library is contained in your designated iTunes music folder. When you tried the Consolidate Library command, you hadn't put anything in your library yet, so nothing happened.
The iTunes music folder location determines the default location for all _future_ music files you rip and add to your library. If you change the location setting, it will not affect the location of any files already in your library. Since you've put your G drive files in your library, and (I'm assuming) you've set your iTunes music folder location to that very same G drive music folder, your music collection will continue to be in one place as you add to it.