What I really like about this meme is that it doesn't ask for best moments, so I don't feel obliged to find something that holds up to some sort of lofty quality standards. Well, comparatively speaking, obviously.
As far as episodes go, I absolutely love Gwen in Everything Changes, Adrift was a very good episode for her, and Something Borrowed was a lot of fun. I could probably find a good moment in any of these, as well as in CoE.
The scene I was really cheering her on, though? The end of Meat, when she decided not to retcon Rhys; not the least because part of me expected her to do it. Rules? Oh, please. Everyone in that scene insisting she follow the rules already broke them in major ways. There are probably also rules against bringing your half-cyber-girlfriend into Torchwood, bringing your alien not-quite girlfriend into Torchwood, opening the rift to get the girlfriend who left you back, shooting your boss (actually, there are laws against that kind of thing), or against keeping people who do any of the above employed. There certainly were rules against taking alien stuff home, and everyone did that in the first episode. Do we even want to know how many rules Jack broke over the last century? And that's not even touching on the fact that Torchwood violates laws and basic human rights on a regular basis. When random old ladies know about Torchwood there's absolutely no reason Gwen should have to ruin her relationship to keep a secret that barely is a secret any longer.
Day 01: Favourite Torchwood Member
Day 02: Least Favourite Torchwood Member
Day 03: Favourite Series
Day 04: Favourite Episode
Day 05: Least Favourite Episode
Day 06: Something You Liked That Most People Didn't
Day 07: Favourite Alien/Villain
Day 08: Favourite Minor Character
Day 09: A Scene That Made You Cry
Day 10: A Scene That Made You Smile
Day 11: A Scene That Made You Angry
Day 12: Favourite Quote
Day 13: Favourite Promo Picture
Day 14: Favourite Couple
Day 15: Favourite Couple Scene
Day 16: Favourite Piece of Music
Day 17: Something You’d Like To Re-write
Day 18: Character You Relate To The Most
Day 19: Favourite Outfit
Day 20: Favourite Gwen Moment
Day 21: Favourite Ianto Moment
Day 22: Favourite Jack Moment
Day 23: Favourite Owen Moment
Day 24: Favourite Toshiko Moment
Day 25: Shag/Cliff/Marry?
Day 26: A Torchwood Geek Moment You’ve Had
Day 27: Favourite Location Or Set
Day 28: Where You Think The Series Should Continue To
Day 29: Best Torchwood on Doctor Who Moment
Day 30: Why You Love Torchwood