gtdev.se uses log files. The information stored in these log files are:

your IP address,
your user agent (which may show which browser and/or operating system you are using),
a timestamp of when you visited gtdev.se.

no personally identifiable information is stored in these logs.

Google Analytics

gtdev.se makes use of Google Analytics.
Google Analytics record information about visitors such as:

What website you came from to get to gtdev.se,
how long you browse gtdev.se,
what country your IP adress is associated with.

What does GTDev do with this data?

The information collected helps GTDev understand what kind of people visit gtdev.se and which pages they interact with.
This helps GTDev improve gtdev.se by focusing on the content which the visitors interact with.
If you wish to opt-out of Google Analytics, you can install the Google Analytics Opt-out Browser Add-on.