Governor General is a representative of a head of state. The term is mostly used in Commonwealth realm countries, where the governor general is a representative of the British monarch, who is the head of state of the Commonwealth realm countries.
Sometimes the title is spelled as Governor General, which is used in Canada, but sometimes it is spelled with a hyphen "-", Governor-General, which is the spelling used in Australia.
Her Excellency the Right Honourable Michaëlle Jean, C.C., C.M.M., C.O.M., C.D., Governor General and Commander-in-Chief of Canada
Welcome to the official web site of the Governor-General of the Commonwealth of Australia