Pau only has one more year on his contract so I think the talk about helping the Lakers out of "salary cap hell" is a bit overblown. They don't have much in the way of salary commitments after next season. By the summer of 2014, they'll have Nash on the books for $9.7M and, if he re-signs, Howard for $20M or so, and that's it. They'll be major players in the free agent extravaganza that year regardless of what they do between now and then with Gasol.
Gasol hasn't been a good fit playing the PF spot with either Bynum or Howard, but I think he'd work well at C with Aldridge at the PF spot. He's about the best option out there for a C who could be made available. The biggest problem is that he makes $19M and acquiring him would leave no money except for the room MLE and veteran's minimum deals for filling out the bench. If the Lakers would take Hickson, Freeland, and a couple of 2nd rounders, I'd be in favor of doing the deal. If we have to include the 10th pick in this draft, I'd say it's too expensive.