gform_get_entries_args_entry_list

add_filter( 'gform_get_entries_args_entry_list', 'your_function_name', 10, 2 );

add_filter( 'gform_get_entries_args_entry_list_1', 'your_function_name', 10, 2 );

/**
 * @param array $args {
 *     Array of arguments that will be passed to GFAPI::get_entries() to fetch the entries to be displayed.
 *
 *     @type int   $form_id         The form ID for which entries will be loaded.
 *     @type array $search_criteria An array of search criteria that will be used to filter entries.
 *     @type array $sorting         An array containing properties that specify how the entries will be sorted.
 *     @type array $paging          An array containing properties that specify how the entries will be paginated.
 * }
 */

add_filter( 'gform_get_entries_args_entry_list', function( $args ) {
 
    $meta_key   = 'my_meta_key';
    $meta_value = rgget( $meta_key );
    if( ! $meta_value ) {
        return $args;
    }
 
    if( ! isset( $args['search_criteria']['field_filters'] ) ) {
        $args['search_criteria']['field_filters'] = array();
    }
 
    $args['search_criteria']['field_filters'][] = array(
        'key'   => $meta_key,
        'value' => $meta_value
    );
 
    return $args;
} );