I don't see Denver trading him to us this off season. Maybe at the deadline, but Denver has all the leverage because of the damned ending of the CBA- if he doesn't sign an extention with them this season he is going to lose a lot of money. But I agree, I wouldn't like to lose Gallo if we traded for him- Carmelo really likes him and I think they'd be great team mates. But then looking at our roster, it's hard to see how they could start together unless you slide Gallo to the 4 (there goes the rebounding), and Amar'e to the 5 (but he's not keen on playing at the centre spot for more than 15mins a game), and have randolph off the bench at the 4 and 5. It would be nice if we could just sign him outright next offseason, and if it was any other year we'd have a great shot, but the impending lockout really screws us with regards to signing free agents next year.
Anyway, don't pin all your hopes on getting him- we've already seen what can happen when you get your hopes too high on a player coming to save you!