There are quite a few gurdy-friendly ABC's on Richard Robinson's web site, as well as some french music in RIchard's own collection, I have loaded up some of the available ABC files
the web site is http://livetunebook.qualmograph.org.uk
if you navigate to Contents, then click on Show People Selector, next to Paul Sherwood you will see a button 'View Collections', from there you should be able to find them
One thing to remember is that Richard's policy is not to make tunes that are copyright publically visible on the site, and in response to this policy you will find quite a few modern tunes are hidden from public view, so for this reason downloading the original ABC files as well is recommended.
I'll be interested to see you things develop.
btw a nice way to share tunes on the web is provided by noteflight.com, have a look at this blog http://folkmusicnotes.wordpress.com/
and the way it links to tunes (many good gurdy tunes here too!).
I don't know how to import ABCs into it, if indeed it is possible, perhaps you have to convert to musicXML - something I haven't looked into yet.