Stinkbugs like most bugs will "go to the light!" So I turn off lights except for one so I can reach them. If you are careful, you can get them to walk onto a piece of paper and then walk them outside, I'm sure they enjoy going from a warm house to 20F LOL You do have to be quick or they fly back inTell us how you catch them!
And I have to ask, what is a GF? That breed abbreviation is escaping me.

If you try swatting at them or harrass them, they will stink you, so you just have to be patient. And that stink lingers even if you wash hands, I know from experience

GF stands for Gamefowl.