I don’t know where it came from but I got it from South Park.
RED HEADED STEP CHILDREN NEED NOT APPLY
The origin is from the TV show Gilligan’s Island. It’s in reference to the redhead movie star “Ginger”.
>>I dont know where it came from but I got it from South Park.
Likewise.
http://www.southparkstudios.com/full-episodes/s09e11-ginger-kids
South Park: Ginger Kids
Original Air Date: 11.09.2005
Cartman suffers from a mysterious and sudden onset of Gingervitus. Sick and tired of being ridiculed for his red hair, light skin and freckles, he rallies all the ginger kids everywhere to fight against discrimination and rise up and become the master race they are intended to be.