The full song lessons are brand new. The GT guys just worked a deal with a record company for copywrite permission to do lessons on thier songs. SO the songs you see posted are ones that have just been put up in the last month since this new thing happened. I hear they are working with more companies to get more songs, i am sure within the next few months they will have quite a selection. I would love me some SRV myself ;)
See ya around the site!