alatriste,
as far as the reject is concerned we do it the same way.
I was however surprised to learn that the G/A decicion also rests with the comander in your company.
In our company a G/A is executed whenever any one of the pilots calls "GO AROUND". No matter who is flying and who is not.
Background: In contrast to a reject, a G/A is almost always a safe course of action.
How is it done elsewhere?