It ok, and even great to find girlfiend from game. Sometimes it works, sometimes it doesn't as in usual situations.
It doesn't compare to work, but relationship in hobby. Which is usual how to to people meet.
This is an excellent point. Normal people take up hobbies to meet and interact with other people of the same interest. That inherently includes, meeting somebody you fall in love with.
Otherwise, there'd be no mechanism to meeting people except bars and online dating, and the average quality of those relationships has a poor track record to my eye.
While it may interfere some with gaming, the new SO shouldn't totally negate your hobby. But conversely, you should not skip the opportunity of having an SO in favor of gaming.