Magana: Mahaifin Gabriel dan Lutheran ne daga asalin Hirschberg im Riesengebirge a Silesia, yayin da mahaifiyarsa ta kasance Katolika daga asali daga Heilsberg a yankin Ermland (Warmia) na Gabashin Prussia wanda kwanan nan ya zauna a Königsberg; iyayen biyu sun zo gudun hijira zuwa Jamus ta Yamma a lokacin gudu da kuma fitar da Jamusawa a lokacin yakin duniya na biyu. 'Yan gudun hijira daga lardunan gabashin Jamus sun sha wahala daga son zuciya a Jamus ta Yamma, kuma an yi watsi da dangin mahaifiyarsa a matsayin "Poland" a Jamus ta Yamma. Sigmar Gabriel ya bayyana tarihin iyalinsa a matsayin "labarin daji na gudu da kuma fitarwa" kuma ya lura cewa iyayensa sun magance raunin fitarwa a hanyoyi daban-daban.
Shekara ta 1989