Saving Small Signal Parameters in Eldo

Hello,

I'm trying to plot gm/id in Eldo using the Pyxis GUI.  However, I can't seem to figure out how to access gm.  In HSPICE, I would've done something like the following:

.probe gm_id = par('gmo(X1)/i(X1)')

...but this doesn't work.

Thanks,

Jake