Her husband Alon and toddler made it back to the kibbutz after hiding in the woods for 12 hours, her brother Gili Roman said on Friday.
Roman-Gat, a 35-year-old dual Israeli-German national, had left Kibbutz Be'eri a month ago, fearful of the region's insecurity and had only returned there for a Sabbath visit the day before the raid, Roman said.
On Friday, Roman surveyed the wreckage of the family home in Kibbutz Be'eri, an agricultural kibbutz 3 miles (5 km) from Gaza, which was one of the first towns hit in Hamas' attack.
The Israeli military said it killed dozens of Hamas gunmen in the Be'eri area.
"We are talking about our family, three women captured, in captivity, held hostage by the terrorist regime in Gaza," Roman said, adding relatives and friends had been searching for them since the attack.
Persons:
Gat, Geffen, Alon, Gili Roman, Be'eri, Roman, Yarden, Zaka, Christophe Van Der, Alison Williams, Rod Nickel
Organizations:
Saturday, Gaza, Reuters, Thomson
Locations:
BE'ERI, Israel, Gaza, Beeri, Kibbutz Be'eri, kibbutzes, Be'eri