¡Claro! Aquí te dejo una guía para instalar CivilCAD en AutoCAD 2013 de 64 bits:
Acquisition & Installation:The engineer navigates to the Official CivilCAD Download Center to locate the legacy installer for 64-bit systems. After installing, a new "CivilCAD" menu appears alongside the standard 2013 ribbon. civilcad para autocad 2013 64 bits