Adafruit Feather M4 Express User Manual

Gemma M0
Connect 3vo on the Gemma to 3.3v on the GPS.
Connect GND on the Gemma to GND on the GPS.
Connect A1/D2 on the Gemma to TX on the GPS.
Connect A2/D0 on the Gemma to RX on the GPS.
Feather M0 Express and Feather M4 Express
Connect USB on the Feather to VIN on the GPS.
Connect GND on the Feather to GND on the GPS.
Connect RX on the Feather to TX on the GPS.
Connect TX on the Feather to RX on the GPS.
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Adafruit Feather M4 Express Specifications

General

Brand	Adafruit
Model	Feather M4 Express
Category	Microcontrollers
Language	English