The milk did fine - and I could not tell that it had ever been frozen. So, the next time I went to the grocery store I picked up an extra gallon to freeze. We hate running out of milk, and now we don't have to, which is good because a lot of the homemade things I make require milk.
BTW - the milk does turn a light yellow color when frozen, I don't know why, but it turns creamy white again when thawed. Strange, but true.