Hey,
Im thinking of two possible issues.
JavaScript conflict – do you know how to use FireFox and Firebug to check for error messages? They will appear under the console tab in firebug.
Dodgy CSS / CSS conflict – I can see on my demo site that the plugin is still using a version of the CSS that forces the character count to display below the WYSIWYG field. What I found a few months ago is that some browsers dont handle this very well, and where I use this plugin in production I changed it so the count displays in the grey box at the bottom of the editor.
The demo link is below, you should see the character count on this page but I suspect you wont because it’s the second issue, dodgy CSS that some browsers may not like.
https://demo.itsupportguides.com/gravity-forms-wysiwyg-ckeditor/single-page-form/
This is what you should be seeing: https://i68.tinypic.com/2888l92.png
Are you able to determine which issue you’re having? Failing that, can you provide me a link (you can use a temporary paste bin if you feel more comfortable).