According to Huawei Update, Huawei Watch GT 2 users received the latest update version 126.96.36.199 which is 17.59MB of size. It brings supports for access card function and optimizes system stability.
How to update Watch GT 2:
Connect the watch to your phone using the Huawei Health app, open the app, touch Devices, touch the device name, choose the Firmware update.
Huawei Watch GT 2 has 1.2 Inch (3.05 cm) AMOLED Display display for apps and other functions of the smartwatch. On the wear-ability side, this smartwatch weighs 29 grams. It has other features like Waterproof, Fitness Tracking, 445 mAh battery capacity, Circular, Curved Dial Design, 1.2 Inch (3.05 cm) AMOLED Display.
Source: Huawei Update