makes a live event that does require manual update

gf_to_events_calendar.php

<?php
add_action( 'gform_after_submission_3', function ( $entry ) {
    if ( ! function_exists( 'tribe_create_event' ) ) {
        return;
    }
    $start_date = rgar( $entry, '2' );
    $start_time = rgar( $entry, '3' );
    $end_date   = rgar( $entry, '4' );
    $end_time   = rgar( $entry, '5' );
 
    $args = array(
        'post_type'             => 'tribe_events',
        'post_title'            => rgar( $entry, '1' ),
        'post_content'          => rgar( $entry, '6' ),
        'post_status'           => 'publish',
        'EventAllDay'           => false,
        'EventHideFromUpcoming' => false,
        'EventShowInCalendar'   => true,
        'feature_event'         => false,
        'EventStartDate'        => $start_date,
        //'EventStartTime'        => $start_time ? Tribe__Date_Utils::reformat( $start_time, 'H:i:s' ) : null,
        'EventEndDate'          => $end_date,
        //'EventEndTime'          => $end_time ? Tribe__Date_Utils::reformat( $end_time, 'H:i:s' ) : null,
    );
 
    GFCommon::log_debug( 'gform_after_submission: tribe_create_event args => ' . print_r( $args, 1 ) );
    $event_id = tribe_create_event( $args );
    GFCommon::log_debug( 'gform_after_submission: tribe_create_event result => ' . var_export( $event_id, 1 ) );
} );

//modified from https://docs.gravityforms.com/gform_after_submission/#h-8-create-an-events-calendar-plugin-event
//more details at https://gist.github.com/leepettijohn/0ab7e5a7474f9f77df20 - I didn't bother with the hours minute stuff bc I didn't care enough