GlacialList .NET objects are a third-party control set that is not identified by the .NET addin for UFT. You can try using such techniques as Insight Object identification or text output values for the object to try and access the data, but in order to have full support for the object, you will need to utilize the .NET extensibility features of UFT. This is a custom solution that you can develop to use UFT with custom unsupported objects. Please see the link below for the online documentation on how to do this:
Also, please reference the Product Availability Matrix for more info.