Hi @lluj,
The best possible approach is to use the new Revit plugin with our new upcoming Grasshopper plugins. In the new plugins the data is transferred between the platforms using the HBJSON format (https://github.com/ladybug-tools/honeybee-schema/wiki).
This means you can load a model from Revit into Rhino/Grasshopper without loosing any data during the translation.
I can add you to our early access group if you are interested to give it a try yourself. I’m just worried that since you are a new user grasping all these new concepts can be challenging. It might be a good idea if you spend some time and use the honeybee legacy plugins and learn the basic concepts from the available resources.