From my level of knowing GDL - it is not possible to create real Archcad-profiles in GDL. Just the other way round is possible - to use Archicad-Profiles in GDL.
Many 3D-commands use "profiles" (not Archicad-profiles) in form of coordinate-lists.
I personally like to use the Tube-command: in the GDL-handbook you can read:
TUBE n, m, mask,
u1, w1, s1,
un, wn, sn,
x1, y1, z1, angle1, !!!! here !!! this is the pointlist for the coordinates for the Profile which later is following the path..
xm, ym, zm, anglem !!!! this is the coordinate-list for the path..
To use profiles - you must create the coordinate-list for your profile..
AC5.5-AC25EduAut, PC-Win10, MacbookAirM1