LinuxBSDos.com published a Fedora 16 GPT disk partitioning guide
Anaconda, the Fedora system installer, is probably the best installation program available on any Linux or BSD distribution, and the version that comes with Fedora 16, version 16.25, has a couple of visible enhancements that make it even better. One of those enhancements is support for GPT disk partitions. GPT, or GUID Partition Table, is an alternate partition scheme that eliminates the restrictions of the MBR or Master Boot Record partitioning scheme.Fedora 16 GPT disk partitioning guide
With GPT, partitions sizes greater that 2 TB are possible, and more than four primary partitions can be created. Those are two major shortcomings of the MBR partitioning scheme. In Fedora 16, Anaconda defaults to GPT in standalone installations. However, when the target disk has an existing installation of another distribution, it creates MBR partitions, if that is what the existing OS is using.