It would be unfair to give a verdict here as Force Gurkha hasn't launched. Stay tuned for further updates. Moreover, Mahindra Thar has an ARAI mileage of 15.2 Kmpl for all the variants. Follow the link to get an alert when Force Gurkha is launched.
As of now, the brand has not revealed the price figures of Force Gurkha 2020 but it can be expected around Rs.10.0 Lakh (Ex-Showroom). Moreover, we would suggest you to wait for the official announcement.