|First Appearance||"Have You Ever Been Unsupervised"|
|Last Appearance||"Unhappy Campers"|
|Voiced By||April Winchell|
Gerta moved to Hazelnut from Germany sometime around 1990 with Dieter, as part of an "obstetrician exchange program", as we learn in "The Way They Were".
It's unknown if she's still an obstetrician, as in "Hazelnut's Finest" it's mentioned that her emergency room skills saved someone's life.
Her husband is still alive, as their son sent him a videotape about his life in Hazelnut. This means he is living in Germany. ("To Germany with Love")