I have been looking for pages on GoGooryo, one of Korea's ancient Kingdom, but couldn't find many resource to it.  So I am listing sites I know and planning to grow this list.

GoGooryo is Korean pronounciation.  

It was called Gori, Goryo, Koryo, GoGoori, Gawoori.

Actually Korea is another name of GoGooryo.

http://gogogo.or.kr  Exibition of Koguryo wall painting (flash, Korean)

http://koguryo.org  An academic society about GoGooryo.( Korean )

http://go333.com  GoGooryo Korean community

http://1nara.org   Some interesting articles about Koguryo origin.