Here is a little more simpler method using createGcApp application.
In addition to giving it a much more familiar interface, it also fixes
some of the bugs in the previous script such as those preventing
spaces in application names. The usage of the new version of the tool
should be pretty straight forward. Start by downloading the .dmg, and
opening the image. Inside, you should find a readme file, a script
called createGcApp, and the source folder. Double-clicking the script
will prompt you with questions about name, url, and icon for the
application shortcut (make sure it's a square if you include an icon).
The resulting file will then be saved to the /Applications folder.
Thanks so much to Mait for sharing this much easier version.
Screenshot for how it looks: