My question to those who want Gortat is why? We have a center. We don't need a starting center. KG is not a 4 in the current NBA. The league has changed. Lebron and Carmelo are now playing the 4. You can't start Gortat and KG. Neither can guard the new 4 spot for 30/40 mins a night.
You could either start them both and stay on KG's quick rest schedule. Or you could play Gortat off the bench for KG. In either case you'd have some overlap, but with KG playing 29 MPG and Gortat playing 31 MPG, you only have 12 MPG where there is an overlap - I don't see that as a huge risk, and it gives you the option to be even further conservative with KGs minutes.
Then you have Bass/Wilcox/Green splitting the rest of the 36 MPG at PF. Something like Bass as the starter, Wilcox as the fourth big, and Green in small ball lineups makes sense. I think that's a superior rotation than what they have now, where Wilcox is the primary option at C behind KG, Sully & Bass are platooning, and Green is taking the small ball minutes.