/usr/share/application-registry/glabels.applications is in glabels-data 2.2.8-3build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8  | glabels
	command=glabels
	name=gLabels
	can_open_multiple_files=true
	expects_uris=false
	requires_terminal=false
	mime_types=application/x-glabels
	uses_gnomevfs=false
 |