Question about GC and Cells

I am attempting to build some relatively simple 3D parametric cells.   Unfortunately Feature Cells can't build the geometry I need.  Which leaves me with GC.

Before I start I have a few simple questions.

1) Can I build cells with GC that are driven by parametric tables like Feature cells.

2) Can the cells be place using vanilla MicroStation or does GC need to be loaded to place them.

3) Are there any GC cell examples out there I can play with.  The GC example file has one cell lib one square cell in it.  Not sure what thats all about or if there is a special command I'm supposed to use to place it.

Thanks,

DavidG