As a woman, my biggest priorities in a pack are that it is lightweight to start with (because my max capacity is going to be less than a mans due to my smaller stature) and that it adjusts to fit my body so that I can get some of the weight off of my shoulders and onto my hips. Pack fit is tremendously personal, but I have found that Kifaru packs do this the very best for me. I have never found anything about pack fit that is gender specific, so I don't see the need for something "women's specific". At least for Kifaru the small waist belt adjusts small enough for me at 5'3 and about 130lbs, and I know it could go even smaller than what I need it to. I currently run the ultralight duplex frame with an EMR2 as a packbag...while it's typically more space than I need, it's a minimal weight penalty and the best way I have found to carry awkward meat loads.
Hauling blacktail deer in the EMR2, on the ultralight hunting duplex frame
Packing out a Dall Sheep cape, horns and some of the meat in my Kifaru KU5200
Packing a load of caribou and misc gear, Bikini frame with the Rondevous bag
I used an Arcteryx Bora for several seasons, but it never fit me well enough to get the weight transferred to my waist, which made it uncomfortable at heavier loads. They are quality packs, and usually pretty reasonably priced. Just didn't fit me well, especially at weights above 40lbs.
I used a Mystery Ranch NICE frame with 6500 bag and really liked how it fit and carried weight, but it was like 10lbs empty. Since my max load is around 80lbs, and I prefer to carry more like 50-60lbs if it's for any longer distance, having the weight of the pack be 10lbs empty reduced the amount of weight I could put in it.
Packing a packraft and misc gear in my Mystery Ranch
I used a Kuiu Ultra 6000 for some summer backpacking trips, and felt it was a pretty decent pack. It carried loads up to around 60lbs well, and was lightweight to start with. Ultimately it was just a bit less comfortable for me with heavy loads than my Kifaru packs, but I still think it might be worth looking into, especially if your gf won't be carrying loads above 60ish lbs.
Hauling a packraft and my half of our gear in the Kuiu Ultra for a weeklong summer trip
Lots of pack options available, and don't feel like you need to limit yourself to a women's specific pack. Kifaru has been what works the very best for my body size and type, as well as the weight I need to pack, with the Kuiu Ultra with Pro suspension probably being my next choice. I am told Stone Glacier's small waist belt will accomodate someone of my stature, but have not personally used a SG pack.
I would add that if she plans to hunt with you, but won't be carrying meat weight, then plan to get her a larger volume pack than what you think she will need. Reason being, if you are hunting together and you kill something, you will likely load her up with the bulky stuff which tends to be higher volume even if it doesn't weigh much. You can get her into a higher volume pack for minimal increase in weight over a similar pack of smaller volume. It's easy to cinch the extra volume down if she doesn't need it, but you can't make a smaller pack bigger.