Yes, gold star for not knowing about "brifters". Integrated shift and brake levers came a bit later with the second generation of pro level index shifting, in many cases they used at the cable stops that mounted to the downtube shift bosses, as you have on your Gios with bar end controls, sometimes called "bar cons".

My notice was that the bar end controls were of a time when the cable stops that fit on the shift bosses were not yet. When bar cons were popular so were clamp on shifter assemblies and a clamp on cable stop.

My first road bike had Campagnolo bar end controls, I adapted to them but they were vague to shift. I would hit my knee on them occasionally. It was either trim some from the end of the bar or buy downtube controls, which was what I did. Never looked back.

Only have brifters on my one Campagnolo Ergo 8 equipped bike. All else downtube controls. When I ride with the modern guys they just can't imagine having to reach down to shift. Slackers, perhaps? If I was racing again I would have them, but I am not. I won't race masters until they bring drug testing to the local races, its different out here in SoCal.