Gm parameter of PA current source

hi all

In ADS software I m trying to assess Gm parameter of a transistor model I m using.
I can get value from Ids vs Vgs by computing the directing coefficient of the curve.

But anybody could give me another way to calculate this parameter?

Thank you everybody

there is a function called GM , it get it directly
also in simulation engine selected a detailed report about the components , it show it

khouly

Thank you very much