Laszlo is correct...Without the GS MEP Add-On (or other Add-On) your engineer will not be able to produce "BIM" with AutoCAD. The important part of "BIM" is the "I", which cannot be produced with AutoCAD alone, and as I tell all my clients and users "garbage out - garbage in".
David Larrew, AIA, GDLA, GSRC
Architectural Technology Specialist
a r c h i S O L U T I O N S
WIN7-10/ OSX 10.15.7
AC 5.1-25 USA