The core group, or ''
gar'in, that would eventually found the kibbutz was formed from members of the Hashomer Hatzair Zionist Youth Movement in Poland. The original nine founders of the kibbutz came to the land of Israel (Mandatory Palestine at the time) in 1939, originally settling in Ein HaMifratz near Haifa. Once their group grew to thirty, they transferred to Givat Michael northwest of Ness Ziona to train for settlement (hakhshara''). The group worked to build roads as well as harvest fruit in the neighboring orchards in the developing area. Despite their efforts, the group's economic circumstances were dire. Just after the close of
Yom Kippur between 5–6 October 1946, the group moved to their current location next to Kibbutz
Gat in the
Shephelah as one of the
11 points of settlement established in the area that night. The kibbutz was established with the help of funding from
Keren Hayesod on land purchased by the
Jewish National Fund. Egyptian troops advanced within a kilometer of Gal On, but efforts by kibbutz members to lay minefields helped defend the kibbutz and maintain Israel's southern front during the war. In late October 1948, the kibbutz served as a base for the
Israel Defense Forces'
Operation Yoav as it was attacked by Arab forces, resulting in the capture of
Bayt Jibrin in the east. In 1949, kibbutz
Beit Guvrin was established nearby. The kibbutz's population was boosted by a group of
Holocaust survivors who had arrived on the refugee ship
Exodus in 1947. In 1951, a large group of Hashomer Hatzair members arrived from
North America. A group of Israeli Hashomer Hatzair members joined ten years later, in 1961. Additionally, the kibbutz also absorbed a small group of members of
Mapam from
Uruguay. The economic situation was difficult and exacerbated by a critical lack of water. Gal On had considerably large tracts of land that could not be cultivated because of the shortage. The kibbutz had a well that supplied 60,000 cubic meters of water a year—almost all of which was used for drinking water and daily needs. Only when the Israeli
National Water Carrier was completed was it possible to expand the cultivated areas.
2000–present In the year 2000, the kibbutz faced economic hardships: The kibbutz was losing money, and kibbutz children were leaving for the cities. Consequently, Gal On members decided to change its ways. Kibbutz members decided to adopt a new "security net." This stabilized the economic situation, but had little effect on demographics. Although more kibbutz children are staying to live on the kibbutz, few become kibbutz members. ==Archaeology: Canaanite fortress==