For many years, my fundamentalist cousins have refused to buy Girl Scout cookies, because of their support of the pro-gay lifestyle. (Instead, they will make a donation to the GS Troop of the price of a box of cookies.) I too have heard of this and their relationship with Planned Parenthood and abortion.
An event took place in 2010 at the UN where there were many reports of pro-abortion, pro-homosexual materials were distributed.
It seems that the National Federation for Catholic Youth Ministry (NFCYM) did an investigation. Here is a copy of their report.
Based on my reading, their investigation accepted the explanation given by the Girl Scouts. In my opinion, MFCYM is either too accepting of the relationship between PP or willing to "wink and nod" at it. (That is my opinion and I am sticking to it.)
Considering that there are many Girl Scout Troops (Daisy, Brownie, GS, Seniors) sponsored by Catholic parishes in this archdiocese, I thought you might find this interesting.