Reg channel length in gpdk045

Dear Andrew,

I am using gpdk045 MOSFET transistor in cadence Schematic editor. Here 45nm is the technology node or gate length ?. I require to know both the gate length (Lg) and effective channel length (Lch) of the MOSFET. Could you please give some information on this?

Note : Lch = Lg-2Xd,

Xd - lateral diffusion from Source/Drain.

Thanks and Regards,

K. R. Pasupathy