Gustavo Arturo Germán Ehlers Trostel (23 June 1925 – 8 July 2017) was a Chilean sprinter. He competed in the men's 400 metres at the 1948 Summer Olympics.

International competitions Representing 1946South American Championships (unofficial)Santiago, Chile1st400 m hurdles55.71947South American ChampionshipsRio de Janeiro, Brazil1st400 m49.02nd4 × 100 m relay3:17.01948Olympic GamesLondon, United Kingdom18th (qf)400 m49.511th (h)4 × 400 m relay3:23.81949South American ChampionshipsLima, Peru1st200 m49.53rd4 × 100 m relay3:24.51951Pan American GamesBuenos Aires, Argentina11th (sf)200 m22.96th400 m49.44th4 × 100 m relay42.32nd4 × 400 m relay3:17.71952South American ChampionshipsBuenos Aires, Argentina3rd200 m22.01st400 m48.73rd4 × 400 m relay3:18.11953South American Championships (unofficial)Santiago, Chile6th100 m11.33rd200 m22.12nd400 m48.53rd4 × 100 m relay42.62nd4 × 400 m relay3:17.11954South American ChampionshipsSão Paulo, Brazil12th (sf)200 m23.64th400 m49.72nd4 × 400 m relay3:16.9

Personal bests 400 metres – 47.9 (1951)

References