Mr Gorges was born in Britain, he died in Britain. He was tasked to oversee investments for two years by a nephew and as a result he was the first colonial governor of the province of Maine. Consequently he is said to be a citizen of the USA, (he died in February 1658)..
The problem with nationality and citizenship is that we tend to adopt people as belonging to something that did not exist at the time and consequently it is a falsehood. It is the same with all these generals, governors of the confederacy; they did not identify with the United States of America, they had their own state they swore allegiance to, so why call them citizen of the USA? How dare we?
It is the same for people from Wales, Scotland, Northern Ireland. They may have opposed the Brits but from a nationality point of view, their behaviour was judged by the British laws.
Associating people with states / nations that may not even have existed at the time are false facts, pure and simple.