Ideally, gnome-schedule should store its data/config/etc in folders according to this Freedesktop spec: http://standards.freedesktop.org/basedir-spec/latest/
Especially: http://standards.freedesktop.org/basedir-spec/latest/ar01s03.html

I first heard about the xdg desktop dirs thing through this post, which does a good job at explaining the issue/challenges that this spec addresses: http://ploum.frimouvy.org/?184-cleaning-user-preferences-keeping-user-data

See also: http://ploum.frimouvy.org/?207-modify-your-application-to-use-xdg-folders

So, for example, instead of putting stuff in ~/.gnome/, we could store files like this:
- $XDG_DATA_HOME/gnome-schedule/crontab/
- $XDG_DATA_HOME/gnome-schedule/at/

... with their respective fallbacks (as described in the specs).