Very wild Idea!
1: the Laker's would have to trade Lebron and GS would not compromise the core of the best team in the league with a trade for him.
2: I doubt Lebron would sign there in free agency in search for an extra chip as in the likes of Shaq, Malone, ect. Further, I doubt he would compromise his style, and at that have much value, as a catch and pass player. (he is not known for shooting, running around, or playing defense; so why would he become such a player seasons before retiring.)
I'm sure this is all obvious to any NBA spectator, but figured Id post anyway. LOL