Is there a clothing template for genesis figures?
I want to make my own clothing.
You mean a base mesh/quick suit? There's one at Renderosity, I think, though I've no idea how good it is or what restrictions it has for sharing (if that's relevant). However, most people make their own from scratch - different clothes will require a different base, and different modelling styles will also want a different base for a given type of clothing.
does that mean that i have to rig it myself as well?
The Transfer utility will get you close, though you may well need to adjust the weight-maps and things like skirts will certainly require at least some reworking (depending on whether you want to adjust them with handles or morphs or both).
Generally, tight clothing is easy, the looser and more detailed it is the harder it gets.