Sweetwater has these that are listed as new and no longer available.
http://www.sweetwater.com/store/detail/SGGVGVBCThey say:
the limited-edition Gibson Government Series SG solidbody electric guitar. In August of 2011 the US Government raided the Gibson factory in Nashville and seized a large amount of wood. The seized wood, mostly rosewood, was eventually returned. This limited-edition guitar sports a rosewood fretboard that was seized in that raid.
From a gibson.com forum:
The Government Series is a limited edition, 300 LP's, 300 SG's (?), 100 Explorers, 100 Flying V's (I'm pretty sure of the quantities, but not 100% sure) made using some wood returned from the government. They are government gunmetal grey, and solid confiscated/returned rosewood fretboard(here's the joke) made with, "Wood confiscated by the government with dirty fingers" pickups. They come with a COA and a green HS case. I wrote to Gibson asking why they weren't on the website. They told me that they aren't on the website because they were made in such limited numbers.
Apparently they were all sold out before April 1. No basses.