The more I think about this the better it sounds, but are we talking a Top 10-15 pick(?) because if not, that changes things quite a bit.
Just for fun, let's say it would be around #10-15. Even if you don't think any of your favorite prospects are there, you could use the capital to trade up... That's a fun scenario to play with. What would it cost to move into the Top 5 and what capital would that leave you with?
We'd have a pick somewhere between 10-15, one at #12, 20 and 92 in the Top 100 to start with. Man... I love GP as a weapon, but this way you'd offload $28 million in cap space and really open up your draft. Very interesting.