GK-5 and GK-3 have the following differences:
| GK-5 | GK-3 | |
| Communication method | Digital | Analog |
| Connector | Serial GK type | 13-pin GK type |
| Connecting cable |
BGK-3 (1m) BGK-15 (4.5m) BGK-30 (9m) |
GKC-5 (5m) GKC-10 (10m) |
GK-5 and GK-3 have the following differences:
| GK-5 | GK-3 | |
| Communication method | Digital | Analog |
| Connector | Serial GK type | 13-pin GK type |
| Connecting cable |
BGK-3 (1m) BGK-15 (4.5m) BGK-30 (9m) |
GKC-5 (5m) GKC-10 (10m) |