Section G18S was created on January 1, 2022, assuming the Section designation of Section W4S that existed since 2009. Its current and founding Lodges are Cahuilla Lodge # 127, Puvunga Lodge # 32, and Wiatava Lodge # 13. J.K. Oldenburg was the first Section Chief.
The Section owes its ancestry to earlier Sections W4S, Section W4B, and Area 12-A.
The first Conclave was held in the Fall of 2022, and was the second Conclave since the onset of the COVID-19 Pandemic.