Mynewt Driver for Quectel L70-R GPS module...
https://www.quectel.com/product/l70r.htm
Tested with Ghostyu NB-EK-L476 Developer Kit (STM32L476RCT6)...
/libs/tiny_gps_plus
: TinyGPS++ library ported from Arduino to Mynewt
/libs/buffered_serial
: Buffered Serial library ported from mbed to Mynewt
A sample GPS log may be found here...