@font-face {
  font-family: 'GillSans-Light';
  src: url('GillSans-Light.eot?#iefix') format('embedded-opentype'),  url('GillSans-Light.woff') format('woff'), url('GillSans-Light.ttf')  format('truetype'), url('GillSans-Light.svg#GillSans-Light') format('svg');
  font-weight: normal;
  font-style: normal;
}
@font-face {
  font-family: 'GillSans-Medium';
  src: url('GillSans-Medium.otf') format('opentype');
  font-weight: normal;
  font-style: normal;
}
4:05
// Enqueue Custom Fonts
function enqueue_custom_fonts()
{
    wp_register_style('custom-fonts', get_stylesheet_directory_uri() . '/fonts/custom-fonts.css', array(), '1.0', 'all');
    wp_enqueue_style('custom-fonts');
}
add_action('wp_enqueue_scripts', 'enqueue_custom_fonts');