[4] The Old Gardiner High School building was designed by Francis H. Fassett and built in 1870.

Bobby Messenger, Major League Baseball player and sheriff of Sagadahoc County, was a mainstay on Gardiner's sports teams in the first decade of the 20th century.

[5] The Maine Ornithological Society met at the high school in 1907.

[6][7] Vivian Blanche Small graduated from Gardiner High School in 1892.

One program project involved the crew constructing an outdoor earth science building for the school.