JSON - deserialization of dynamic object using Gson

Check out Serializing and Deserializing Generic Types from GSON User Guide:

public class MyClass<T>
{
   public String par1;
   public T par2;
}

To deserialize it:

Type fooType = new TypeToken<Myclass<Foo>>() {}.getType();
gson.fromJson(json, fooType);

Hope this help.