Can a pcell invoke an Ocean script?

dear all

i have a question regarding the feasability of what i want to do with pcells

so i want to cretae a pcell called inverter, and the parameter i pass to it would be a "gm" (the transconductance of the inverter)

so once the user introduce the gm he wants, the pcell invoke then an ocean script which calculates the width of the pmos and the nmos and the number of finger to meet this gm and then return the 3 parameters wn wp nfing

so far i am able to create an inverter pcell starting fron the wn wp nfing, but i want to automate the step gm--> (wn, wp, nfing)

do you think its possible, can soembody give a hint about this

many thanks in advance