The Hong Kong-Guam (HK-G) cable system is a 3,700 kilometer undersea cable connecting Tseung Kwan O (TKO), Hong Kong and Piti, Guam.

RTI (through its multiple subsidiaries) and Google (through its indirect subsidiary GU Holding Inc) are the joint builders of the HK-G cable system.

The HK-G cable system consists of 4 fiber pairs, with design capacity of 48 Tbps (12 Tbps per fiber pair). Google owns approximiately two thirds of a fiber pair on the HK-G cable system via spectrum sharing technology. RTI owns all the remaining capacity and fiber pairs. 

The HK-G cable was designed to land at NTT's TKO Cable Landing Station and data center in Hong Kong and the GNC Cable Landing Station and data center in Piti, Guam.

NEC was awarded the supply contract for the HK-G cable system. Furthermore, HK-G cable system utilizes capital from the Fund Corporation for the Overseas Development of Japan’s ICT and Postal Services Inc. (Japan ICT Fund), along with syndicated loans from Japanese institutions including NEC Capital Solutions Limited, etc.

In November 2020, HK-G joint builders withdrew from the FCC their application for a license to construct, land, and operate the HK-G submarine cable system connecting the United States and Hong Kong.