Hmmm... Pene Azul's blueclickey Tab sez it's in E-flat, so you'd have to capo on the 4th fret to get it in the key of G, but again you'd lose that bass run. Can you tell us the individual notes of the bass run that you want to play? Perhaps then we can suggest other alternate tunings that might do the trick.

Speaking of tricks, one way to capo AND preserve your lower bass notes on the guitar is to use a Keyser capo to cover ONLY the first 5 strings, leaving the 6th string open (then tune that string as needed). There are also capos that are designed to accomplish the same thing (cover some but not all strings).