There are real world instances where 'species' have arisen that reproduce parthenogenetically - meaning there are no males and the offspring is essentially a clone of the mother. One weird example is the lizard Cnemidophorus neomexicanus, which is a hybrid of two other lizard species which spontaneously decided it wasn't going to do that whole sex thing either of its parent species did, and instead exclusively produces female clones of itself.

So your ideas aren't all that farfetched and could potentially work well with the Gungans' unique genetics being the key to unlocking the secrets of cloning rather than them actually practicing artificial cloning themselves.