No idea if she is gravid, especially since the picture doesn't show her whole body.
If she was housed with a male, then she probably is.
Typically, Jackson's give birth in the morning.
If she does give birth, you have to remove the babies to their own enclosure right away, so they don't become a postpartum meal.
Babies will need lots of wingless fruitflies, pinhead crickets and newly hatched silkworms.