Is there any way to give ubuntu server a GUI?
 

As everybody knows that ubuntu server has no GUI. So is there any way to give it a GUI?

Use the command: sudo apt-get install ubuntu-desktop
(or kubuntu-desktop or xubuntu-desktop)

Thank you very much for the reply. So which desktop will pe preferable for low ram PC, kubuntu or xubuntu. And how to connect to internet using a wireless device like cell phone or a wireless modem?

Xubuntu is the lightest.