Gross emigrated to the United States in 1893 and settled in New York's
Lower East Side. After World War I, the family moved to
Borough Park, Brooklyn. After engaging in a variety of business ventures, he settled in the women's blouse business, which, after his retirement, was carried on by his sons into the 1950s. He viewed his business solely as a means of subsistence, for his true passion was Torah. He retired from business at a relatively young age to devote himself to
Torah study and was supported by his sons. He is remembered as sitting at his desk, in a book-lined study, with a "shivisi" sign in front of him and a number of
sefarim opened before him. He rose many hours before dawn each day to learn and write. He was attentive and meticulous to beautifying religious observance, and paid particular attention to the selection of an
etrog, the purchase of a beautiful etrog box, and the decoration of his
sukkah, arguably one of the first in the country that had canvas walls. Although his son Moshe was the
chazan of a large
Orthodox synagogue only a block away, he refrained from going there because the Torah was not read from a central
bimah. ==Torah works==