Hi,
Thanks for your post. While your career trajectory is right on par with your peers. I would agree that your GMAT score is a bit low for the programs on your list. Given you seem to feel quite strongly that you can improve your score, I do strongly encourage you to retake the exam.
Your extracurricular activities might be a little light, but it does sound as though you have some solid examples to use in your essays? The fact that your father runs an NGO, while interesting, isn't enough to add substance to your profile. However if you have been involved in the organization this could certainly be worth mentioning in your resume and perhaps an essay.
Overall you certainly can be competitive for admission at the schools on your list. You will need to find ways to stand out in the very large applicant pool in order to ensure success.
Best,
Stacey