Geocoder form with Google Maps autosuggest
From a once over:


When you wrote 

var latLng = results[0].geometry.location;
$('#lat').val(results[0].geometry.location.lat());
$('#lng').val(results[0].geometry.location.lng());


you probably meant to write 

var latLng = results[0].geometry.location;
$('#lat').val(latLng .lat());
$('#lng').val(latLng .lng());

I wonder why you capture new google.maps.places.Autocomplete(input, options); into autocomplete since you do nothing with autocomplete.
1 var block with comma separated variables is considered the standard, preferably on top.
You could capture document.getElementById('location') into a var to prevent repeated DOM lookups
Don't do console.log in production code
Creating GeoCoded as an object with 1 property is overkill, why not simply 
var geoCodingDone = false;
lowerCamelCasting is not applied consistently : autosuggest -> autoSuggest, autocomplete -> autoComplete
There is an indentation problem after return true;


With all that, I would counter suggest something like

$(document).ready(function () {

  var geoCodingDone = false,
      locationInput = document.getElementById('location'); 

  createAutoSuggest();

  $('#myform').on('submit', function (e) {
    if (geoCodingDone) 
      return true;

    var geocoder = new google.maps.Geocoder(),
        address  = locationInput.value;  

    e.preventDefault();

    $('#myform input[type="submit"]').attr('disabled', true);

    geocoder.geocode( {'address': address }, function (results, status){
        if (status == google.maps.GeocoderStatus.OK) {
            var latLng = results[0].geometry.location;
            $('#lat').val(latLng.lat());
            $('#lng').val(latLng.lng());
            geoCodingDone = true;
            $('#myform').submit();
        } else {
            $('#myform input[type="submit"]').attr('disabled', false);
        }
    });
  });
});

function createAutoSuggest(){
  var options = { types: [] };
  new google.maps.places.Autocomplete(locationInput, options);
}