I have heard that G referred to as a modal G or a Beatles G. But yeah its just a G. Its cool sounding, in that open position, but as far as general arranging practices, 5ths are hardly ever doubled, and if anything has to be ommitted, a 5th is the first to go...
If you ever have gone throught the torture of studying classical 18th century theory, there are all kinds of rules restricting the use of 5ths. Paralell 5th's (2 5th intervals that move in the same direction) are forbidden. So are paralell octaves...dont ask me why, and its really not important, however, the idea is to have as much contrary motion (notes moving in opposite directions)as possible in an arrangement. That creates the sense of movement and building tension that makes the resolve to the tonic all that much more sweet.
Actually the dead were real good at creating that tension and contrary motion with their phrasing and chord voicings.
Information is not knowledge. Knowledge is not wisdom. Wisdom is not beauty. Beauty is not love. Love is not music. Music is the best.- the girl from the bus