:explode merge tag modifier for use on GravityCalendar event titles

gk-explode-modifier.php

<?php // DO NOT COPY THIS LINE

add_filter( 'gform_merge_tag_filter', function ( $value, $merge_tag, $modifier, $field, $raw_value ) {

	if( 'all_fields' !== $merge_tag && 'explode' === $modifier ) {

		$choices = explode(',', $value);
		foreach ($choices as $key => $choice) {
			$output .= $choice.'<br>';
		}
		return $output;
	}

return $value;
}, 10, 5 );