Integrated USB-to-Serial drivers for common programming cables.
CHIRP does not fully support the GM338. Some people have tried modifying CHIRP for Waris series (GM338 is part of the Professional Series, not Waris). Do not attempt – you risk bricking.
and a compatible hardware interface to unlock features like 128-channel capacity, MDC1200 signaling, and customizable button configurations. www.motorolasolutions.com Core Programming Software Motorola GM338