Quote:
Originally Posted by Kobaia I'm fairly sure its V7/II- in the Realbook |
Ah yes, and we know how reliable that is.

While G7 is a fairly common sub for the Gm7, most recordings of Changes that I've heard use a m7 rather than a dom on the second chord.
Either way, G7 or Gm7, you'd be ok playing the Bb on the 4th beat. Not as a b9 tension to the G7, but as a chromatic approach to the Am7.