setStyle_GeoJSON.js

map.data.setStyle(function(feature) {
 var RESINFO = feature.getProperty('RESINFO');
 var color;
 var color_line;
 if(RESINFO == 'gas'){
  color = 'blue';
  color_line = 'blue';
 }else if(RESINFO == 'oil'){
  color = 'red';
  color_line = 'red';
 }else if(RESINFO == 'oil and gas'){
  color = 'blue';
  color_line = 'red';
 }else if(RESINFO == 'no info'){
  color = 'gray';
  color_line = 'gray';
 }
 return {
   fillColor: color,
   strokeColor: color_line,
   strokeOpacity: 1,
   strokeWeight: 2
 };
});