It will be interesting to see how this turns out, but I expect eventually gay marriage will become a normal practice in Korea just like it is in the US:

Seoul Mayor Park Won-soon has put himself at the center of controversy after he expressed his support for same-sex marriage during his recent trip to the United States.

Talking to the San Francisco Examiner, Park was quoted as saying, “I personally agree with the rights of homosexuals,” adding Korea would become the first Asian nation to legalize same-sex marriage.

The Seoul Metropolitan Government (SMG) homepage was immediately inundated with comments, most of them complaints.

Park has successfully drawn public attention, but it remains to be seen whether this bold political gamble will help the potential presidential bid of Park, a liberal-minded former NGO leader.  [Korea Times]

You can read more at the link, but interesting both the religious groups and the gay activists groups are upset Mayor Park’s stance.  The gay activist groups do not think he is doing enough.