These two are so awesome. But I love the way there's kind of a sadness connected to the way Batman can't ever really be honest with Gordon about who he is (well, he does in that one story offer but Gordon rightful refuses).
So it makes it extra nice when Gordon shows the that he does know some of the important things. And I like the way this story uses all the moments to build on the next. Like when he says "Like hell he wasn't" about Robin being his son it's not anything to do with knowing their actual relationship as legal parent/son, but that he saw in his eyes years ago with Dick that Robin is Batman's family.