Hi you can use calibre to generate spice (*.sp) from GDS II . the Calibre Utility name is known as lce ( which is used in LVS ) .Originally posted in cdnusers.org by mohanch007
Please find the command to extract
calibre -spice CHIP.sp -hcell HCELL cmosx_top.lce_rules > log.lce
NOTE : i) Hcell is optional
ii) in rule file you will give the location of your GDS II path for corresponding spice you would like to extract.