If they threw the series on Steam or something, I'd buy them no question. When I first played Gears, I hated it, it was a series that I could not stand playing except for co-op, but then the second came out and I enjoyed it, and by the time the third rolled around, I had bought the premium collector's edition. I still have that statue of Marcus Fenix sitting on my dresser. I don't know what it was, but that series grew on me fast after the first one. I really can't think of a series that went from such dislike and apathy to a personal favourite in a time span that quick. I think my tastes changed during the time and I enjoyed it more as a result. That and not getting instantly killed by people wall bounding with a Gnasher as frequently.
That said though, I didn't bother with Judgement. While it did star my favourite Gear in the series, Baird, I just had a bad gut feeling about it the entire time leading up to its release so I decided to avoid it. Turned out I was right from everything that I heard.
So yeah, I'd love if they released 1-3 on PC in some bundle, especially if it was acquirable on Steam. Chances of that though are slim to none, so oh well, too bad, I'll just keep playing more Payday then.