iap

We're doing some practice approaches this evening and I wanted to find a few new ones to try. I came across this one but it says that an ADF is required (unfortunately I don't have a working ADF) and I don't want to recommend an approach I couldn't actually fly! What about this approach...

On my "bucket list" (maybe not very glamorous) is to fly an instrument approach in IMC conditions to a grass strip. A bit of searching around the Northeast finds only one: 08N, Keller Bros in PA. I could hack something up from FAA databases, but maybe some other crazy soul has done this?

I'll apologize up front. I know I've seen threads on this but can't find any. What is the authorizing document for using GPS for VOR approach to the MAP?