Newbie Q: Porting TObject to gpc?

Hello, this is probably a silly newbie question, but I have searched the archives and documentation without much enlightenment for me. I have existing sourcecode, which probably comes from Borland Pascal and uses TObject. Can I use TObject in gpc, or do I have to replace it with some other object? Is there some comprehensive list of pitfalls when porting Borland stuff over to gpc? Am I better off rewriting it from scratch ;) ? Thanks Alex