While I agree that Rondo will not be traded for Gordon, I actually really like Gordon, and think he would be a great addition to this team. He has really suffered playing on a team with no PG in Detroit, but if he has someone who can get him the ball in position to score, he is one of the most dangerous scorers in the NBA. He also showed that he can be a decent defender when he wants to at times on Ray Allen a couple years ago.
So, while I obviously don't like the original idea here, I think Gordon is a very realistic trade target, and a guy who could fit in well with Rondo as a future building-block for this team.
As for his contract, I would much rather be paying him $10 million per year than paying Jeff Green or Perk $8-10 million per year. "Closers" like him are hard to come by in this league.