He was a multiple participant of the Lithuanian Chess Championships, in which he won nine medals: 5 gold (1972 ((won additional match with Algimantas Butnorius 3½ : 2½), 1974, 1978 (shared with Viktor Gavrikov who participated outside the competition), 1984, 1988 (shared with Vitalijus Majorovas and Darius Ruželė, and was better by an additional factor), 3 silver (1981, 1987, 1995) and bronze (1994).
[1][2][3][4] Also Gintautas Piešina twice won Baltic Chess Championship: 1977 in Gomel and 1988 in Panevėžys.
[5][6] In 1993 in Vilnius Gintautas Piešina participated in FIDE World Chess Championship Baltic country Zonal tournament.
[7] Gintautas Piešina played for Lithuania in Soviet Team Chess Championships (1975-1979, 1985) and won individual gold medal in 1985.
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