@felmue it worked flawless, thank you so much!

I have an M5Stack for AWS, and I have a GPS module connected to its port C. What is the index of the HardwareSerial I should use?

I tried from 0 to 6, but I had no luck reading the data.

HardwareSerial GPSRaw(2);

void loop() {
  if (GPSRaw.available())
  {
    int ch = GPSRaw.read();
    Serial.write(ch);
  }
}

Connection

What I am doing wrong?