3 pages | PDF | 799.5 KBG.I. Blues by Elvis Presley and Mac Davis is a classic tune composed by Sid Tepper and Roy Bennett. The song is 32 bars in length and is composed in the key of C major and A minor. The upbeat melody, catchy lyrics, and memorable performance of Elvis Presley make G.I. Blues a true classic. With its catchy chorus and positive vibes, this song has become an iconic part of the pop music canon. Whether you're a fan of Elvis or just looking for a great tune to sing along to, G.I. Blues is a song you won't soon forget.