Here in Sweden they can be -- but it depends on how you are managing your blood sugars. Basically, the general maternity care is hands off, but if you fall into a risk category, they do monitor you more.
I had a GD test early and late due to Type I being in my immediate family. I do know my friends who were diagnosed complained about feeling overmonitored. But they really work hard to get babies delivered naturally here, and so that means making sure they don't get too big I guess.
Depends on what you mean by heavily monitored.
Our glucose test is also inbetween the US first and second test. It is 2.5 hours long. I don'w know what the next step immedietly after failing it is.