This Plugin implements an easy configurable Widget which can display your top Google search querys (Keywords) and link it to your internal search like a tag cloud.
You can use its default font sizes or override them by the classes that are applied. It is recommended to have APC installed to cache the Google API requests but its not necessary.
It is written and currently maintained by Johannes Lauter and uses the Google Analytics API PHP Class from Chris Hope.

Installation

Upload the Directory ‘wp-gquery-widget’ directory in your Plugin directory.
Fill out your Google Analytics Account Data.
Select your Project and fill out the necessary Options in the back-end and that’s all.

For those with Sidebar Widget compatible theme

Simply at the Widget in your Design > Widget Menu.

For those without Sidebar Widge

Open your themes’ `sidebar.php` file if you have one and add `<?php wp_gquery_widget::widget(); ?>

You can download it here  :) or visit the WP Plugin Page.