Click the tag "About GTI" and one will learns that its members are four countries: China, Mongolia, sSouth Korea and Russia. GTI's predecessor had five members: North Koreas. It is unclear why N Korea was excludedfrom GTI; there is limited information about GTI in the Web.
It is not a proper name, merely a memorandum of understanding (MOU). See
Chang Jae-soon, S Korea to Participate in Russian-led rail, Port Development Project in N Korea. Yonhap, Nov 13, 2013
english.yonhapnews.co.kr/national/2013/11/12/10/0301000000AEN20131112007053315F.html
three consecutive paragraphs:
"The memorandum of understanding was the most tangible outcome from Park's summit with Russian President Vladimir Putin. It calls for steel giant POSCO, Hyundai Merchant Marine Co. and Korea Railroad Corp to participate in the Rajin-Khasan development project.
"The project was designed to develop North Korea's ice-free northeastern port of Rajin into a logistics hub connected to Russia's Trans Siberian Railway. In September, a 54-kilometer, double-track rail link reopened between Rajin and the nearby Russian town of Khasan after years of renovation.
"Once the project to modernize the port of Rajin is completed, the rail-connected port can be used as a hub for sending [and receiving] cargo by rail
(i) Rajin is a district of city of Rason 羅先特別市. http://en.wikipedia.org/wiki/Rason
(ii) Khasan (urban-type settlement)
en.wikipedia.org/wiki/Khasan_(urban-type_settlement)
(Population: 742 (2010 Census))