Chinese deities used giant gourds to carry wine. Chinese see gourd as a token of mystery. It is hard to find out what is inside. It may not always be complimentary. Many times, a gourd has nothing inside.
Gourd is a fantastic subject. It can be any shape. Its crinkled leaves can be many shapes. Its vine can go anywhere. One can do anything.
There should never be a lesson on how to paint gourd. This is how wonderful the subject is.