You can also export it as dxf or dwg and import it in archicad.
(File/GDL/Open object - type of file:DWG/DXF).
But it will also be triangulated (not by archicad but from Rhino) during the export, Since Rhino exports meshes and not nurbs (which are not supported by archicad)
Petros
ArchiCAD 22 4023 UKI FULL,
Archicad 21 6013 UKI FULL, ArchiCAD 20 8005 UKI FULL
iMac Retina 5K, 27-inch, 2017
4.2 GHz Intel Core i7
32 GB 2400 MHz DDR4
Radeon Pro 580 8192 MB