How to arrange the DC layer in layout ?

In my layout ,i plan to use three layer(metal1 . metal2 . metal3) as the DC layer(GND . VDD. Vgs ) ,but i am not sure which one as the GND layer and which one as the VDD. which one as the Vgs layer . thanks

your question is not clear.please tell more about that

You should provide more information.
1) What is the function of the circuit? Amplifier, Mixer...?
2) Frequency?
3) Signal Layout

Greetings