I think the girl scouts are great. I will tell you why. Especially if your daughter is primarily around Catholics, it gives her an opportunity to socialize and experience relationships with people from backgrounds different from her own. Our troops always have adults who volunteer so there is a lot of supervision. And of course, it is just plain fun. For whatever reason, it is my experience that cliques aren’t really tolerated in scouts, so it is good “girl time” without that added preasure.
Hopefully you have good, open communication with your daughter so if anyting comes up she (or you) want to discuss as a result of her being in the scouts you can sort things out, together. And as an aside, I have never once heard abortion being discussed at a girl scouts gathering. I don’t think you need to worry about that (unless one of the other girls brings it up as side talk; if so, see the first sentence of this paragraph.