Born: March 10, 1896
Gregor was born in a village in the part of Austria known as Carinthia. During World War I, he served in the Austro-Hungarian army and was wounded. Raised a Catholic, Gregor and his wife became Jehovah's Witnesses during the late 1920s. Gregor supported his wife and six children by working as a farmer and quarryman.
1933-39: The Austrian government banned Jehovah's Witness missionary work in 1936. Gregor was accused of peddling without a license and briefly jailed. When Germany annexed Austria in 1938, Gregor led his congregation in a boycott of the plebiscite ratifying Austria's union with Germany. Because of Gregor's anti-Nazi stand, the mayor of his town had Gregor arrested on September 1, 1939. Gregor was sent to Berlin to be tried by a military court for opposing military service. He was sentenced to death. On December 7, 1939, Gregor was executed by guillotine in Berlin's Ploetzensee Prison.
1940-45: During the war, Gregor's entire family was arrested for refusing to cooperate with the Nazis. Two of Gregor's sons were killed: one son was beheaded in the Ploetzensee Prison, where Gregor had been beheaded in 1939; another son was shot. Gregor's oldest son, Franz, refused to participate in military training, would not salute the Nazi flag, and was sentenced to five years of hard labor in a camp in Germany.
In addition to Gregor and two of his sons, other members of Gregor's Jehovah's Witness congregation were persecuted by the Nazis.