I've never been a Gasol fan, but he is an upgrade over scola, though I would REALLY hate to lose Gragic.
I would probably give up Martin, scola and Dragic
Gasol, Darius Morris, 1st rounder
The best part of that trade would be moving Bud to the 2 and bring our future star Marcus Morris up.
Would be a great starting 5 IMO