Arduino Yun - Sending a non-character message to e-mail using Temboo

Using Arduino Programming Questions
1

Is it possible to send a non-character message to e-mail using Arduino Yun? I used the example code of Temboo for Yun and the TinyGPSPlus library for my GPS.

My intention is to send via e-mail the coordinates my GPS module reads.

SendEmailChoreo.addInput("MessageBody", displayInfo());

I used displayInfo() to the message body, but it doesn't work. The error says:

exit status 1
invalid use of void expression

This is for my thesis prototype project. Thanks for helping!
If sending an email is not capable of sending the GPS data, what can you suggest to send the GPS data via net?

2

this is my displayInfo code

void displayInfo()
{
Serial.print(F("Location: "));
if (gps.location.isValid())
{
Serial.print(gps.location.lat(), 6);
Serial.print(F(","));
Serial.print(gps.location.lng(), 6);
Serial.print("Google Maps"); Serial.print(gps.location.lat(), 6); Serial.print(F(",")); Serial.print(gps.location.lng(), 6);
}
else
{
Serial.print(F("INVALID"));
}

Serial.print(F(" Date/Time: "));
if (gps.date.isValid())
{
Serial.print(gps.date.month());
Serial.print(F("/"));
Serial.print(gps.date.day());
Serial.print(F("/"));
Serial.print(gps.date.year());
}
else
{
Serial.print(F("INVALID"));
}

Serial.print(F(" "));
if (gps.time.isValid())
{
if (gps.time.hour() < 10) Serial.print(F("0"));
Serial.print(gps.time.hour());
Serial.print(F(":"));
if (gps.time.minute() < 10) Serial.print(F("0"));
Serial.print(gps.time.minute());
Serial.print(F(":"));
if (gps.time.second() < 10) Serial.print(F("0"));
Serial.print(gps.time.second());
Serial.print(F("."));
if (gps.time.centisecond() < 10) Serial.print(F("0"));
Serial.print(gps.time.centisecond());
}
else
{
Serial.print(F("INVALID"));
}

Serial.println();
}

3