The upcoming addition to the Gears of War franchise will be called Gears 5 rather than Gears of War 5.
Head of The Coalition Rod Fergusson confirmed the name on Twitter, explaining that, while the franchise name is still “Gears of War”, the company decided to shorten the title to fit in with its new family of products.
Source: N4G PC Gears 5 Definitely Won't Be Called 'Gears of War 5' – IGN