A new version of the Gapfill question type (version 1.7) is now available from Github. This release is primarily to ensure the drag and drop functionality works with Moodle 2.9. It also addresses some minor bugs particularly with handling languages with accents.
The code is here
https://github.com/marcusgreen/moodle-qtype_gapfill/tree/gapfill_1.7
I would greatly appreciate feedback on this release.
The release notes are here
https://github.com/marcusgreen/moodle-qtype_gapfill/blob/gapfill_1.7/releasenotes17.txt