Many technicians already know GODIAG GT100 Plus as a practical breakout box for diagnostics and programming work. But now GODIAG has released the newer GODIAG GT100 PLUS GPT, and many users are asking the same question:
What is the real difference between these two devices?
Although the two products look similar, GT100 PLUS GPT is clearly designed for more advanced diagnostics, heavy-duty vehicles, and modern ECU bench operations.
12V vs 24V Vehicle Support
The standard GODIAG GT100+ is mainly built for regular 12V passenger vehicles.
The newer GT100 PLUS GPT adds an internal 24V to 12V voltage converter. This means technicians can safely connect standard 12V diagnostic scanners to:
- Heavy-duty trucks
- Commercial vehicles
- Construction equipment
- 24V diesel systems
without risking damage to the scanner hardware.
For workshops handling both passenger cars and trucks, this is one of the biggest upgrades.
DOIP Communication Support
Modern BMW, Mercedes-Benz, Land Rover, and Volvo models increasingly rely on DOIP Ethernet communication instead of traditional CAN systems.
The standard GT100 Plus mainly focuses on traditional diagnostic routing, while the GT100 PLUS GPT adds native:
- DOIP support
- ENET communication routing
- Modern Ethernet diagnostics compatibility
This becomes extremely important during advanced programming, coding, and IMMO work on newer European vehicles.
Without DOIP support, many newer vehicles may fail to communicate properly during programming procedures.
GPT Bench Programming Capability
Another major difference is GPT support.
With the standard GT100 Plus, technicians still need traditional bench or boot operations for many ECUs.
The GT100 PLUS GPT supports:
- GPT routing
- Boot CNF1 single-line communication
- Cover-free bench reading
This allows some ECUs to be read or written in Bench mode without opening the ECU housing.
When used together with tools like:
- PCM Flash
- KESS V2
the GT100 PLUS GPT helps reduce soldering risks and avoids damage caused by opening sealed ECUs.
This feature is especially valuable for ECU tuners and advanced programming workshops.
Which One Should You Choose
If your daily work mainly involves:
- Basic diagnostics
- OBD breakout testing
- Passenger vehicle communication checks
then the standard GODIAG GT100 Plus is usually enough.
But if you work on:
- Heavy-duty trucks
- Modern DOIP vehicles
- ECU bench tuning
- Advanced programming jobs
then the GODIAG GT100 PLUS GPT is clearly the more professional solution.
Final Thoughts
The GT100 Plus remains a useful and affordable breakout box for general automotive diagnostics. However, the GT100 PLUS GPT expands the platform into a much more advanced tool with support for:
- 24V commercial vehicles
- Native DOIP communication
- GPT bench operations
For modern workshops handling both diagnostics and ECU programming, the GODIAG GT100 PLUS GPT offers significantly wider compatibility and safer workflow options.
