TGSL was founded in 1969 by three mothers who recognized the need for am\n organized after school program for girls who had the desire to play softball. Teams were organized by geographic location with no try-outs or drafting. After several years of this informal approach, the league developed the organizational structure that still exists today. By 1979 the league was sanctioned by the Amateut Softball Association (A.S.A). In, 2006 TGSL became a pony organization.
In 2008, TGSL opened up thier new home at the former site of the Old Mill Lane School. These four fields have become the cornerstone of the future of softball at TGSL.