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<?php
/**
 * Gravity Perks // GP Post Content Merge Tags // Get Confirmation URL for Current User
 * http://gravitywiz.com/documentation/gravity-forms-post-content-merge-tags/
 */
function gppcm_get_confirmation_url_for_current_user( $form_id ) {

	$entries = GFAPI::get_entries( $form_id, array( 'field_filters' => array( 'created_by' => get_current_user_id() ) ) );
	$url     = gform_get_meta( $entries[0]['id'], 'gppcmt_url' );

	return $url;
}

// Example of how this function would be called.
gppcm_get_confirmation_url_for_current_user( 123 );