Auto add member to Group?

I was looking at my profile on here and saw i was in the 50+ posts group i was wondering how i can set up a group like that what i mean by that is how to make it auto add after certain post count, also if its possible to do that for male and female so i can have different color names and sections for each normally id try and do it myself but havent a clue this time lol im gussing is to do with scirpting so i post it here

Not possible for male female.

However based on number of posts you can make a group. There is a autosubscribe feature, you can choose that.