Gert-Dietmar Klause (born March 25, 1945). is a former East German cross-country skier who competed during the 1970s. He won a silver medal in the 50 km at the 1976 Winter Olympics in Innsbruck.
Klause won two medals in the 4 x 10 km relay at the FIS Nordic World Ski Championships (gold: 1974, silver: 1970.) His best individual finish was a 4th in the 15 km in 1970.