Yeah, you'll find quite a few of us who proclaim Guild to make the best 12's on the market, and I hope someone can help you out.
First a question......Are you sure of the model number and that its not FG212? The single G designation was used to describe a slightly different body shape. The G's were a slightly smaller version of a dreadnought shape, not like OOO or OM, but the same square shouldered, fat waisted dreadnought design scaled down about 3/4-7/8 size. FG's are more common.