What type of laptop to u have that hs not usb, network, cd, or dvd? Does it even have a floppy drive?
GRUB is a program that is part of the Linux install. It is installed along with the kernel and everything else. You can get it as a stand-alone program if you want. http://www.gnu.org/software/grub/
. Then you can download it and burn it to a cd or something, if you were interested.
To answer your question GRUB gets installed on your hdd. It isn't part of your bios or anything.
You could try taking out the hdd, and then connecting it to your desktop. Then reinstalling Linux back on to it. That is a deffinite possibility.