Yes she was.
I don't recall there being one. It goes dumbledore then McGonagall then after them it is the heads of house. (Slytherin) Snape, (Ravenclaw) Flitwick, (Hufflepuff) Sproat, (Gryfindor) McGonagall.
She is a professor of Hogwarts (teaches transfiguration), Head of House Gryffindor, Deputy Headmistress.
A Scotish accent. It just sounds different because everyone else basically has an English accent.
Minerva McGonagall.
There is no specific "teacher for Gryffindor". Minerva McGonnagal is the head of the Gryffindor House; on the other hand, different teachers teach different subjects - not to one specific house, but to all the houses.
Professor Minerva McGonagall's full name is Minerva McGonagall.
Professor Severus Snape starts out as the Potions master and Head of Slytherin House. Professor Minerva McGonagall is the Transfiguration teacher and Head of Gryffindor House.
Minerva McGonagall is more powerful than Amelia bones
Minerva McGonagall turns into a cat. She is an Animagus who can transform into a tabby cat at will.
Just Minerva McGonagall. As far as I know, no additional name has been given in the books.
Minerva Mcgonagall?
Minerva McGongall is Scottish and has a Scottish accent.