The Grasshopper Rhino components are in the Grasshopper Rhino toolbar. Yes, so far you can export only *.3dm. I believe they are working on a component which can export other formats…
To export another format I’m currently using a script by @Helvetosaur.
Objects only have a GUID once they’ve been baked to Rhino. That’s why your ID components are showing up red. Try using a Bake component first, which has the GUIDs of the baked objects as an output, which you can then pass into the export component. The component is basically selecting the objects from the model and using Rhino’s export to do the file conversion.
In terms of being obsolete, eleFront is still actively maintained and developed, with some unique features that aren’t part of the native components, slightly different approaches / priorities, and more examples lying around, but of course if you can do what you need with native components, then that’s a great thing!