Gynandromorph are not hermaphrodite. An hermaphrodite animal can breed, as a male or as a female, but a gynandromorph can't. It's usually a female with caracteristic of a male, or a specimen half "male", half "female". In both case, they won't breed because there are no true gonads and spermatheca. I heard many experiences when I was breeding phasmids a few years ago, they were never fertile