I guess most facade companies have their own design process.....
But generally you can design facade structure the same as any other structure...
We use mostly Dlubal RFEM
We do thinks like that...currently also in Toronto at The Well project
But you need special knowledge in engineering and manufacturing and erection for such structures....
It is a long time ago since I used Femap Nastran the last time ...but yes I think you can do that within the Program... but don't ask me how to do it ..