When using FCKEditor plugin with Grails (http://grails.org/FCKeditor+plugin), need to use .decodeHTML() for the value that you want to display as in the edit.gsp and show.gsp, else it will be shown as HTML-safe codes which is not what you want.
edit.gsp
<fckeditor:editor
name="description"
width="100%"
height="400"
toolbar="Standard"
fileBrowser="default">
${fieldValue(bean:eventInstance, field:'description').decodeHTML()}
</fckeditor:editor>
show.gsp
${fieldValue(bean:eventInstance, field:'description').decodeHTML()}
create.gsp
<fckeditor:editor
name="description"
width="100%"
height="400"
toolbar="Standard"
fileBrowser="default">
${fieldValue(bean:eventInstance, field:'description')}
</fckeditor:editor>
