Gas Transmission Operator Gaz-System S.A. is a designated natural gas transmission system operator in Poland. The company was established on 16 April 2004 as a wholly owned subsidiary of PGNiG. Gaz-System owns and operates all gas transmission and distribution pipelines in Poland, except the Yamal–Europe pipeline owned by EuRoPol Gaz S.A. The company also responsible for construction of the terminal LNG at Świnoujście and the Baltic Pipe pipeline between Poland and Denmark.