The film, which was screened at the London Indian Film Festival last week and was part of the official Cannes selection, has received high praise from critics.
Trade analyst Taran Adarsh said on Twitter: "GOW intl release dates - Middle East on 28 June and France on 25 July."
In India, the film opened to full houses in Bihar, Uttar Pradesh and Jharkhand, and distributors have also reported a strong turnout in multiplexes in the metros.
IANS reports that Prashant Kumar Singh, owner of Puja Talkies in Dhanbad, Jharkhand, said: "Gangs of Wasseypur has opened very well with 80 to 85 percent occupancy. Some of the shows were even house-full. The film is going great and even the advance booking is going on full swing."
Bihar-based Brijesh Tandon of HK Tandon and Company said: "Gangs Of Wasseypur has opened very well in Delhi, Uttar Pradesh and Bihar. It is around 80 percent occupancy."
Delhi-based distributor Sanjay Ghai said: "Gangs Of Wasseypur has opened with 70 to 80 percent opening in both single screens and multiplex in Delhi and is going great."
In Mumbai, the response was slow but, according to distributor Rajesh Thadani of Multimedia Combine: "Gangs of Wasseypur opened with 20 to 25 percent in Mumbai. But it has started improving from the evening shows and would pick up in the night and at the weekend."
Kashyap, who co-produced the film with Sunil Bohra, said it is his most expensive film to date.
Based on real-life events, Gangs of Wasseypur is a revenge story set in the dynamic socio-political milieu of Bihar.