In 1932, the name of the school was changed from Wesleyan Girls’ High School to Methodist Girls’ High School. Such a heavy premium was placed on good behavior within and outside the school premises that M.G.H.S. became an acronym for “Must Gain High Standard” in character, manners, academics, athletics, etc.
During the war in the forties, the Navy requisitioned the use of the school premises, so, the school moved to Yaba, in 1942. A store that belonged to Dr. Nnamdi Azikiwe, on Commercial Avenue, was leased to the school, to house the Day students, while another building, ‘Oke-Ona Lodge,’ located at 56, King George Avenue (now Herbert Macaulay Way), was used by the Boarders. In that same year, the school became a full-fledged secondary school.
In 1945, the school was moved back to its original location on Broad Street, Lagos. It inherited three good buildings left by the Navy. One of the buildings was used as a block of classrooms, while the remaining two were used as boarding house.
Between 1950 and 1951, the school moved to its present site, in Yaba. One of the important achievements of the school during this period was the introduction of Science subjects, up to the School Certificate Level. Another remarkable accomplishment was the introduction of the Higher School Certificate class in the school, for, in 1956, the Ministry of Education granted the school approval to run the Higher School Certificate course.
In 1980, the Lagos State Government took over the school from the Mission. It was an era that witnessed population explosion, which had resultant effects on discipline and corporate life in the school.
In 2001, the Lagos State Government, under the leadership of the Governor emeritus, Asiwaju Bola Ahmed Tinubu, returned Methodist Girls’ High School to her original owner, Methodist Church Nigeria.