Gus kept telling himself that this meeting was not about him. Not about him in the least. It was about the two of them getting to know each other, because obviously since learning of the others' existence, it had become important. Aside from scrunching up his face when his dad called him by his full name, he tried to stay out of it, and let them talk.
His dad talked a bit about traveling up and down the east coast, about the Maine Lobster Festival in the summertime. "I was a traveling salesman for years, even though I got into the trade just as it was about to be phased out..." Gus didn't really listen. Truthfully, he was a bit jealous of all the places his dad had been. When he was the age Gus was now, he was traveling up and down the East Coast, sampling the local fare (even if 'local fare' meant womanizing, in his case). But he was stuck in the city, with a bit more responsibility than he cared for.
Gus didn't ask to follow every aspect of his father's footsteps. He could probably do without the man's insatiable lust for women. He could probably stand to get laid every once in awhile, too, but that was beside the point. It frustrated him a bit to listen to the man talk about his former glory. He was the reason that Gus didn't have much in the way of current glory.
His dad didn't seem to mind that Gianna was babbling. He was fascinated in a way, and he seemed impressed. "Bentleys have been in New York since about the 1870s, when they immigrated from England." Great, he was starting in on immgration crap now. History lessons.
But it wasn't about him. It was about them. So he sucked it up, and stayed quiet, listening, but not really listening. He wasn't being impolite or disruptive in any way, and he definitely didn't let on that he was slightly pissy. Instead, he let them have their time together, and stayed out of the way. At least he got doughnuts out of the deal, and at least they seemed to be getting along well.