Conditionally show/hide panes depending on referrer URL or keywords

Hi,
Is there any module (or custom code) to help me to achieve the next thing:
I have a landing page and I would like to use visibility rules depending on the keyword used on search engine or the referrer url,

i have found this module CTools HTTP Header Plugins but the maintainer doesn't answer to the issue queue for long, and I don't really know if this module can help me to achieve this.

There is another one for Context module: Context Keywords but it is not compatible with panels.

Also I found many PHP snippets to do this but I don't know how to integrate them into Ctools logic

Any help?

Thank you in advance