This js function returns a list of all the nearby hospitals which are marked as safe zones and prints them out.

nearbySafe.js

YOUR_API_KEY = ''

<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=places"></script>

var map;
var service;
var infowindow;

function initialize() {
  var pyrmont = new google.maps.LatLng(-33.8665433,151.1956316);

  map = new google.maps.Map(document.getElementById('map'), {
      center: pyrmont,
      zoom: 15
    });

  var request = {
    location: pyrmont,
    radius: '500',
    query: 'hospital'
  };

  service = new google.maps.places.PlacesService(map);
  service.textSearch(request, callback);
}

function callback(results, status) {
  if (status == google.maps.places.PlacesServiceStatus.OK) {
    for (var i = 0; i < results.length; i++) {
      var place = results[i];
      createMarker(results[i]);
    }
  }
}

In line 10, pass in your current geo_loc

and replace the empty string with your api key in line 1