Kopplin was born on May 20, 1939 in Sterling, Nebraska and graduated from Peru State College in 1966. He attended the University of Nebraska-Lincoln, earning an education specialist certificate in 1982 and a Masters degree in education in 1988.
Kopplin was elected in 2004 to represent the 3rd Nebraska legislative district. He sat on the Education and Natural Resources committees. In 2008, he lost a re-election bid to Scott Price.
|Nebraska state senator-district 3
- "Nebraska Unicameral Legislature". Sen. Gail Kopplin. Retrieved March 15, 2006.