Gold Trail Union School DistrictGold Trail Union School District is a small Kindergarten–8th grade school district located within El Dorado County, California.It includes Cold Springs and Coloma.WWW gtusd.orgHistoryGTUSD was formed from seven one-room schoolhouses in 1956. Gold Trail School was constructed in 1957 to accommodate all K–8 students. The graduating class of 1960 consisted of nine students. In 1991, Sutter Mill Elementary School opened, and Gold Trail School was designated for 4th–8th grade students, while Sutter's Mill handled Pre-K through 3rd grade students. As of 2013, the graduating class consisted of 70 students.