I tried FreeBSD VMimage on my VMWare based on XP, but I failed to load the GUI, orI don't know to load the GUI. Terminal is freely working over it.

FreeBSD by default does not come with any GUI.

You most install the X server/client yourself.
Then edit /etc/ttys to configure it at boot time.

If you try "startx" from the command line, do you get an error message, or does a spartan GUI open up? There are GUIs you can install from the command line and they all require 'X' - like mal.exe said - and you have a wide choice: Desktop environment - Wikipedia, the free encyclopedia

first you have to install it then use it :
this is to generate xorg.conf.new gile configuration of your hardware graphic .
this to copy the file ti the right place .
now type :
and the login manager will appear but all this done only if you have GNOME or KDE or Xfce Desktop environment .

Latest version of xorg does not need a config file (for most configuration)

You should only create one if you have special needs

i would recommend NOT going the GDM route.
if you want gnome, install gnome2-lite from ports and add the following to rc.conf:
dbus_enable="YES"
hald_enable="YES"

then add "gnome-session" to ~/.xinitrc and run startx.
also set a proper hostname in /etc/hosts.