But because he only played in six games during the entire season as the team finished in second position in the league, Gaisser returned somewhat disillusioned to Saint-Louis, who in the meantime had suffered relegation.
A year later Gaisser signed for FC Basel, under head coach Helmut Benthaus, at the begin of the 1979–80 Nationalliga A season.
[1] Gaisser played his domestic league debut for his new club in the home game in the St. Jakob Stadium on 11 August 1979 as Basel won 2–1 against Sion.
[3] He played 23 league games during that season, scoring 3 goals, and thus helped Basel win the championship title.
Later, Gaisser acted as trainer for the youth teams by local French clubs Sierentz, Muespach and Blotzheim.