This is a nice TG intro or Ending in C major. It is 'almost' the cycle of 4ths. I'll explain below under the pic of chord changes. I play it twice. The first time I end it with a V chord to get back to C. The second time I end with a IVm6 to Imaj7. This was one of the first things Ted showed me in an early lesson. Chord diagrams ... Essentially the circle of 4ths but with several tri-tone (b5) substitutions (E7#9 subs for a Bb13, etc.). You can also look at them as 1/2 step approaches. Regardless of what you call or how you remember it, it sounds cool and is typically 'jazzy' and very TG. Enjoy!