Are you the GS Leader? If you are then it's time to stand up for ALL your girls! AND stand up TO ALL your girls! You need to have a meeting about bullying, self respect, respect for personal space, words that hurt, etc..
You can go online to Dove & become a 'representative' for beauty, they send you a DVD that you use to help girls to become persons who have, 'inner beauty'. Most, 'mean girls' lack self esteem so they make fun of others to satisfy their inner need to make themselves feel more secure about themselves, of course this doesn't work for them or the girls they are bullying & it SURELY doesn't mean your DD should EVER have to put up with BS from them, it just means you can help them become someone they can be proud of, that is your job as their leader.
If you are not the leader of the troop then become an assistant & work with the leader to achieve peace & harmony in the troop, if you try & nothing works then it is time for her to leave the troop & the, 'EVIL, SELF RIGHTEOUS' women that seem to be doing their best to make you & your DD responsible for the shortcomings of others!
Girl Scouts is supposed to be fun & educational, to help girls to become the female leaders of tomorrow, if this isn't happening in your troop & you can't change it, she needs to find another troop or something else to do with her spare time, maybe sports, a bowling league or the choir at church, something that is fun NOT hurtful!