| ボツワナ GIA Education and Laboratory Ltd. c/o Desert Secretarial Services (Pty) Limited Plot 2482b Tshekedi Crescent Extension 9 Gaborone, Botswana | |
| 香港（ラボラトリー） GIA Hong Kong Laboratory Limited The Bay Hub, 20/F 17 Kai Cheung Road, Kowloon Bay Hong Kong | 香港（キャンパス） GIA Hong Kong Limited The Bay Hub, 20th Floor 17 Kai Cheung Road Kowloon Bay Hong Kong |
| インド（ラボラトリー） GIA India Laboratory Private Limited 10th Floor Trade Centre Bandra Kurla Complex Bandra (East) Mumbai, Maharashtra 400 098 | |
| 日本 GIA東京合同会社 東京都台東区 台東4-19-9 山口ビル7、11階 110-0016 | |
| シンガポール GIA Laboratory Singapore Pte. Ltd. c/o Camelot Trust 137 Telok Ayer Street #08-01 Singapore 068602 | |
| 南アフリカ GIA Education and Laboratory Proprietary Ltd. GMI House Harlequins Office Park 164 Totius Street Groenkloof Pretoria 0027, South Africa | |
| 台湾 GIA Instrument (Taiwan) Company Tai-Shi Building, 3/F-1 and 3F-2 No. 270, Section 3, Nanjing East Road Songshan District, Taipei City 10551 Taiwan | |
| タイ（ラボラトリー） Gemological Research (Thailand) Company Limited Mitrtown Office Tower 19th Floor Units 1903-1910 944 Rama IV Road Wangmai, Pathumwan Bangkok 10330 Thailand | タイ（キャンパス） GIA (International) Co. Ltd. Mitrtown Office Tower 19th Floor Units 1901-1902 944 Rama IV Road Wangmai, Pathumwan Bangkok 10330 Thailand |
| アラブ首長国連邦 GIA Laboratory FZCO Uptown Tower, 13th and 14th Floors First AI Khail Street Dubai, United Arab Emirates | |
| 英国 GIA England c/o TMF Group 13th Floor One Angel Court London EC2R 7HJ United Kingdom | GIA Laboratory Services UK Limited c/o TMF Group 13th Floor One Angel Court London EC2R 7HJ United Kingdom |
アメリカ合衆国 c/o Cogency Global, Inc. c/o Cogency Global, Inc. c/o Cogency Global, Inc. c/o Cogency Global, Inc. Gemological Institute International, Inc. | GIA Alumni Association, LLC c/o Cogency Global, Inc. 1325 J Street Suite 1550 Sacramento, CA 95814 |
| ボツワナ GIA Education and Laboratory Ltd. c/o Desert Secretarial Services (Pty) Limited Plot 2482b Tshekedi Crescent Extension 9 Gaborone, Botswana | |
| 香港（ラボラトリー） GIA Hong Kong Laboratory Limited The Bay Hub, 20/F 17 Kai Cheung Road, Kowloon Bay Hong Kong | 香港（キャンパス） GIA Hong Kong Limited The Bay Hub, 20th Floor 17 Kai Cheung Road Kowloon Bay Hong Kong |
| インド（ラボラトリー） GIA India Laboratory Private Limited 10th Floor Trade Centre Bandra Kurla Complex Bandra (East) Mumbai, Maharashtra 400 098 | |
| 日本 GIA東京合同会社 東京都台東区 台東4-19-9 山口ビル7、11階 110-0016 | |
| シンガポール GIA Laboratory Singapore Pte. Ltd. c/o Camelot Trust 137 Telok Ayer Street #08-01 Singapore 068602 | |
| 南アフリカ GIA Education and Laboratory Proprietary Ltd. GMI House Harlequins Office Park 164 Totius Street Groenkloof Pretoria 0027, South Africa | |
| 台湾 GIA Instrument (Taiwan) Company Tai-Shi Building, 3/F-1 and 3F-2 No. 270, Section 3, Nanjing East Road Songshan District, Taipei City 10551 Taiwan | |
| タイ（ラボラトリー） Gemological Research (Thailand) Company Limited Mitrtown Office Tower 19th Floor Units 1903-1910 944 Rama IV Road Wangmai, Pathumwan Bangkok 10330 Thailand | タイ（キャンパス） GIA (International) Co. Ltd. Mitrtown Office Tower 19th Floor Units 1901-1902 944 Rama IV Road Wangmai, Pathumwan Bangkok 10330 Thailand |
| アラブ首長国連邦 GIA Laboratory FZCO Uptown Tower, 13th and 14th Floors First AI Khail Street Dubai, United Arab Emirates | |
| 英国 GIA England c/o TMF Group 13th Floor One Angel Court London EC2R 7HJ United Kingdom | GIA Laboratory Services UK Limited c/o TMF Group 13th Floor One Angel Court London EC2R 7HJ United Kingdom |
アメリカ合衆国 c/o Cogency Global, Inc. c/o Cogency Global, Inc. c/o Cogency Global, Inc. c/o Cogency Global, Inc. Gemological Institute International, Inc. | GIA Alumni Association, LLC c/o Cogency Global, Inc. 1325 J Street Suite 1550 Sacramento, CA 95814 |