Hey @Erik_Beeren ,
Welcome to the community! Feel free to Introduce yourself 
to the community if you want to! 
Currently, grashopper does not support collections, which are Speckle’s way of organizing elements. However, there is a workaround that you can use. You can bake your geometry using Elefront and then send it to Speckle using the Rhino connector. This will ensure that you have the layers from Rhino in Sketchup with materials and everything intact.