Check if ACF group has content

acf_group_has_content.php

function acf_group_has_content($group){

	/* Necessarily checks if a groups sub_fields have content
	 because the ACF group always returns true even when the 
	 group is empty */
	 
	foreach ($group as $item):
		if($item):
			 return true;
		endif;
	endforeach;
}

Example usage
$my_acf_group = get_field('my_acf_group');

if( acf_group_has_content($my_acf_group) ):
//do something
endif;