@User: As far as I know, there are no nxtgrd or itf files for this process. Which tool flow is that for? And for "tech to GDS map". . . we have the mapping documented here: https://docs.google.com/spreadsheets/d/176OcP2h_TT_pDP2-zBLijlgFUP38LVgMQPlDtpLcrsk/edit?ts=5eff8387#gid=0 ; but what file forma / tool flow are you looking for, specifically?