| # | Name | Location | Applications |
|---|---|---|---|
| 1. | GMK CO. LTD. | 🇰🇷 Seoul, South Korea | 3 |
| 2. | GMK Electronic Design GMBH | 🇩🇪 Wernberg-Koeblitz, Germany | 1 |
| 3. | GMK Safety Inc. | 🇨🇦 Terrebonne, Canada | 1 |
| 4. | GMK-Gesellschaft fur Motoren und Kraftanlagen mbH | 🇩🇪 Bargeshagen, Germany | 1 |