Introduction:
The office of Governor General of India was a significant administrative post in British India, representing the British Crown. The Governor General had supreme authority over the British Indian territories, including the power to appoint and dismiss officials, make laws, and control the military.

Explanation:
The office of Governor General of India was created by the Charter Act of 1833, which was passed by the British Parliament. The act was designed to reform the British East India Company's administration of India, which had been criticized for corruption and mismanagement.

The Charter Act of 1833 abolished the Governor of Bengal and created a new office of Governor General of India. The first Governor General under the new system was Lord William Bentinck, who served from 1833 to 1835.

The Governor General of India was appointed by the British Crown, and was typically a member of the British aristocracy. The Governor General had broad powers to govern India, and was assisted by a Council of India, which advised him on policy matters.

The office of Governor General of India continued until India gained independence in 1947. The last British Governor General was Lord Mountbatten, who oversaw the transfer of power to India and Pakistan.

Conclusion:
In conclusion, the office of Governor General of India was created by the Charter Act of 1833, which was passed by the British Parliament. The Governor General had supreme authority over the British Indian territories and was assisted by a Council of India. The office continued until India gained independence in 1947.