Hello all, What's the equivalent of the "@m.xm1.msky130_fd_pr__nfet_01v8[id]" kind of syntax we use in sky130 in the gf180 context?

Same

The syntax and grammar are the same. If you ever wonder how to access the subckt of those transistors, I think they are all named m0 if I'm not mistaken.

Use .

option savecurrents

and use

save all

in your .

control

block. By looking into the raw file you will get the used syntax.

@Jorge Marin This is ngspice syntax regardless of the technology. It should be something like this:

@<target_dev>.<device_full_path_in_netlist>[<device_parameter>]

Here an example subcircuit:

xinv in out inv
.subckt inv in out gnd vdd
mn out in gnd gnd NMOS
mp out in vdd vdd PMOS
.ends

To reference nmos device,

@m.xinv.mn[id]

Now,

how to deal with GF180MCU or any other technology that wraps the model with subcircuit?

You need to check the model card to see how the internal device is named or if there are deeper subcircuit inside. As prof. @Boris Murmann mentioned in GF180MCU, the device named internally

m0

but keep in mind that the

x1

depends on your subcircuit naming.