All open source object serialization libraries which I know of (JvAppStorage, NativeXml, OmniXML, SuperObject, lkJSON) seem to have no support for Generics properties yet. (
Have a look to my simple solution using JCL/JVCL serializer in this post:
How to serialize Delphi TObjectList<TMyClass> type to XML with TJvAppXMLFileStorage?
SvSerializer is a Library that serializes and de-serializes to/from Objetic/JSON/XML. A complete tool!
https://code.google.com/p/delphi-oop/wiki/SvSerializer
DeHL have for XML, ini but still not for JSON