Err,GPS & terrain contour mapping are one of the several means of guiding a cruise missile.By your criterion,the vast majority of cruise missiles wouldn’t be cruise missiles!!The writer of the article probably meant inertial navigation systems.Many of technologies used for the Tomahawk(which is your obvious reference) are now used for a host of missiles including the Boeing Harpoon & the Brahmos.The Brahmos is still not a complete project-it will get a datalink as well as the capability to use GPS signals(from the Russian GLONASS,when it becomes fully operational in about 4 years).
http://www.howstuffworks.com/cruise-missile3.htm
This gives a primary definition of cruise missile!!
Err, actually it is two of three.
This is just a missile.