I believe the probes should work if they're J or K type, depending on your engine, but I have no experience with the D180. There's quite a bit on CHT/EGT on the D180 in the archive forums that might be helpful. Just search for "D180 EGT" and you'll get quite a few hits.
EDIT: The Electronics International P-100 is K type, which is compatible with Dynon.
Not sure what you're asking about fuel gauges. You can use the fuel gauges on the D180 or just use Vans gauges. Your choice. If you want to use both at the same time, and I'm not sure why anyone would want to, you may require different senders. Someone more knowledgeable on that topic needs to chime in.