My ASUS Laptop has UEFI and GPT Paritions running on Windows 7 x64. I've heard a lot about these GUIs. How do I access them? As using the F2 button simply brings up the plain old BIOS UI.
Unfortunately, if pressing the button at boot that corresponds to the boot settings doesn't show a UEFI bios, then I'm afraid you don't have it. Unless you just recently bought this laptop, I highly doubt that it came with UEFI and assume that you are mixing your laptop with another ASUS model. There is no way to upgrade to UEFI either, as it utilizes too much storage space for a normal BIOS storage to hold.