What am I doing wrong?

I am fairly new to Javascript and am trying to understand why I am having an issue displaying gps data on a PCD8544. If I comment out the GPS code the display will characters. When the GPS code is included the LCD screen does not display any characters. I tried converting the lat1 variable from number to string but that did not work. WHat am I doing wrong?

A2.write(0); // GND
A4.write(1); // VCC
SPI1.setup({ baud: 2000000, sck:A5, mosi:A7 });

var g;


function onInit() {
  g = require("PCD8544").connect(SPI1,A6,B0,B1, function() {
    g.clear();
    g.drawString("Hello",0,0);
    g.drawLine(0,10,84,10);
    g.flip();
  });

}

onInit();



Serial4.setup(57600,{tx:C10,rx:C11});
var gps = require("GPS").connect(Serial4, function(data) {
  lat1 = data.lat;
  g.clear();
  g.drawString(lat1,0 ,0);
  g.flip();
  });