Ka cika wannan jumlar: A lokacin da Jamus ta mamaye Poland, wanda ya soma Yaƙin Duniya na II, sojojin Wehrmacht sun kama Gostyń a ranar 6 ga Satumba, 1939. A Lokacin Nazi na Jamus
A lokacin mamayar Poland Gostyń ya zama wurin aiwatar da hukuncin kisa na jama'a, kamawa da kuma fitar da 'yan Poland. An fara kama mutane da yawa da kuma kashe su a watan Satumba na 1939. A ranar 21 ga Oktoba 1939 kimanin 'yan ƙasa 30 na garin waɗanda sunayensu ke cikin "Sonderfahndungsbuch Polen" (Littafin Shari'a na Musamman-Poland) wanda minoryan Jamusawa na gida suka shirya, wani Einsatzkommando ya kashe su. Daga cikin wadanda aka kashe akwai magajin garin Gostyń Hipolit Niestrawski, 'yan gwagwarmayar Poland, jami'ai, masu sana'a da tsoffin' yan tawayen Greater Poland. Ya kasance daya daga cikin kisan kiyashi da yawa na Poles da Jamus ta aikata a ranar 20-23 ga Oktoba 1939 a duk yankin a yunƙurin kwantar da hankula da tsoratar da mutanen Poland. An fara korar jama'a a ranar 4 ga Disamba, 1939, tare da 'yan Poland 2,000 da aka kora zuwa Gwamnatin Janar bisa umarnin SS-Standartenführer Ernst Damzog da ke Poznań. Tsakanin bazara na 1940 da 15 ga Maris 1941 an sake fitar da ƙarin 3,222., wani jami'in Poland kuma shugaban kungiyar kwallon kafa ta gari Kania Gostyń, wanda Soviets suka kashe a cikin kisan gilla na Katyn a 1940.