Namesakes
Notable Actors and Entertainers:
1 actor
Brigitte Helm (middle name Gisela) 1908-1996 
Olympic Medalists:
1 bronze, 1 bronze/silver, 1 gold, 1 silver, 1 silver/bronze
(gold) Gisela Mauermayer 1936 discus throw
(bronze/silver) Gisela Arendt 1936 swimming - 100 m freestyle; swimming - 4x100 m freestyle relay
(silver/bronze) Gisela Birkemeyer 1956; 1960 80 m hurdles
(bronze) Gisela Weiß 1960 swimming - 4x100 m freestyle relay
(silver) Gisela Morón 2008 synchronized swimming - team
Other Royalty:
2 archduchesses
Gisela of Austria 1856-1919 Austria-Hungary
Elisabeth Marie of Austria (middle name Gisela) 1883-1919 Austria-Hungary
Saints:
1 blessed
Blessed Gisella of Hungary (a.k.a. Gisela) 985-1065