スウェーデン社会民主労働党
Gertrud Månsson educated herself through autodidacticism and engaged herself in politics and the Swedish Social Democratic Party. On 11 June 1892, she became one of the co-founders of the "Stockholms allmänna kvinnoklubb", which was the first women's branch of the Swedish Social Democratic Party. She became a member of the Swedish Social Democratic Party the same year, and served as the chairperson of the Stockholms allmänna kvinnoklubb three times: 1892–1895, 1897–1898, and 1906–1908. Between 1897 and 1900, she served as chairperson of the Commune of Female agitation, and as secretary in 1900–1902. In 1902, she was elected to the board of the Women's Trade Union alongside Anna Johansson Visborg and Anna Sterky.