It's just a matter of sending the right data down Serial, much like is done to configure the GPS on the Bangle.js 1
The receiver is the AT6558 - There should be a datasheet somewhere detailing the commands, but the closest I have found so far is this one in Chinese (https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/datasheet/unit/Multimode_satellite_navigation_receiver_cn.pdf)
It's possible that given some digging I could also find something in the original SMA firmware too.
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