Yes, it's the German, Dutch, Spanish and Portuguese form of Giselle. .
Gisela Monot's birth name is Gisela Friedrich.
Gisela Hahn's birth name is Gisela Drenkhan.
Gisela Johnson's birth name is Gisela Busch.
Gisela is a German name, but not an actual word. If you are asking for the meaning of the name Gisela: Most sources say that the name (which is old German) means "Geisel" ("hostage", but I'm sure it originally didn't have exactly todays meaning), "Bürge" ("bailer", "warrantor"), "Unterpfand" ("pledge"). One source (the one I personally would trust the most) says, that the name is one of many others with the element "Gisel", which meant scion, sapling, sometimes also "hostage".
Gisela Uhlen's birth name is Gisela Friedhilde Schreck.
Gisela Getty's birth name is Gisela-Martina Schmidt.
Gisela Wilke's birth name is Gisela Clara Wilke.
Gisela Shaw has written: 'Pocket Dictionary of Business German'
Gisela von Collande's birth name is Gisela Huberta Valentine Maria von Mitschke-Collande.
Gisela Drohla has written: 'Das neue Russland' -- subject(s): German fiction, Russian fiction, Translations from Russian, Translations into German 'Tolstojs letzte Jahre'
The name Gizelle means "pledge" or "vow," and is of French origin. It can also be derived from the German name Gisela, which means "bright pledge" or "noble promise."
Alana meaning: Precious origin: German