Group with most members?

[Robert_2006]

The members of my site can create groups. I have sored them in the DB with the members id and the groups id. How can I find the group with the most members? In the case below I would like to return group_id 1.

id |userid |group_id |status |joindate
------------------------------------
1***|1****|1*******|1*****|1180472138
2***|1****|34******|1*****|1180710824
3***|59***|1*******|1*****|1180661614
4***|1****|33******|1*****|1180661614
5***|1****|25******|1*****|1180627931
6***|1****|24******|1*****|1180627804

CREATE TABLE `my_group` (
`id` int(10) unsigned NOT NULL auto_increment,
`userid` int(10) unsigned NOT NULL default '0',
`group_id` smallint(6) NOT NULL default '0',
`status` tinyint(1) unsigned NOT NULL default '0',
`joindate` int(10) unsigned NOT NULL default '0',
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=27 ;

--
-- Dumping data for table `my_group`
--

INSERT INTO `my_group` VALUES (1, 1, 1, 1, 1180472138);
INSERT INTO `my_group` VALUES (25, 1, 34, 1, 1180710824);
INSERT INTO `my_group` VALUES (26, 59, 1, 1, 1180661614);
INSERT INTO `my_group` VALUES (24, 1, 33, 1, 1180661614);
INSERT INTO `my_group` VALUES (16, 1, 25, 1, 1180627931);
INSERT INTO `my_group` VALUES (15, 1, 24, 1, 1180627804);

[r937]

select group_id
     , count(*) as members
  from my_group
group
    by group_id
order 
    by members desc limit 1

[Robert_2006]

I appreciate it. Thanks!