According to the market research firm, Google will be able to increase the number of Android devices in the market from 608 million today to 2.3 billion computers, tablets and smartphones by the end of 2016.
In comparison, Windows devices are projected to grow from 1.5 billion to only 2.28 billion units, Gartner said.
The firm believes that the mobile market in particular will continue to consolidate around Android and iOS, "with other ecosystems struggling to gain traction, and, with most vendors committed to Android." By the end of 2014, three of the five top mobile handset vendors will be Chinese, Gartner said.
In the tablet market, unit shipments are estimated to be about half of the volume of notebooks by 2015, while Windows 8 is not expected to trump either iOS or Android in tablet volume and has to be content with third place.