Would be a firefight. Triple G is more natural at the weight but as X said he is hittable. Could go either way.
Hittable is not the same thing as easy to hit. I don't buy into this if Trinidad can hit you then the opponent will probably lose way of thinking. As if it takes somebody to completely avoid any exchanges in order to win. Tito has been wobbled, dropped and knocked out and none of those guys had Golovkin's power.
Trinidad's conquerors were a natural cruiserweight fighting at 160s, a skillful boxer against a long inactive Tito and a light heavyweight great fighting at his more comfortable weight against a rusty, fat past his prime Tito. Of these three only Hopkins wobbled, dropped and knocked out Tito. I doubt GGG would had fared better against these guys.