I think that gang rape is more common, even on a per capita level, in India than in the US.
Americans are less sexually repressed than a lot of Indians,and Americans mostly do not fancy the idea of having sex in front of other guys.
Gang rape surely happens here, but it is more rare than in India. The law in India is very sexist and biased towards men. A woman who reported a gang rape to the police might worry about the police raping here as well. In some Muslim societies, the raped woman is worthless, since none will marry her. There are cases of women being killed by their own families to remove the disgrace from the family.