not really sure why you'd need to set the focus on the map - unless you have some input element on it, or you need it to be able to respond to some keys / buttons without the user having to tap on the map.
A few ways to set the focus are:
One of them may work
code
$('#yourGmapID').focus();
/code
code
// Set focus on the first element of the class
$('.yourGmapClass:first').focus();
/code
code
var mymap = Apperyio('gmap_name');
mymap.focus();
/code
code
Appery("googlemap_1").focus();
// OR
var myMap = jQuery('[name="googlemap_1"]');
myMap.focus();
/code