By default, glFusion will periodically check for new versions new versions of glFusion and any plugins you have installed, and it also sends some data with the request. Specifically, the following information is transmitted during the version check:
This data is only used by the glFusion development team to understand how broad the install base is and what versions of PHP and MySQL are being used, it is never sold, shared, or disclosed for any purpose.
You can turn off this feature and still check for new versions, but no data will be sent or collected.
Configuration → Site → Update Checker Tab
Send Site Data - set this to your preference - true will send the site URL, PHP version and MySQL version along with the version check - false will not send any data.