It was already known that Tom Clancy's Ghost Recon Wildlands will get a beta. Now the registrations for the beta are being taken. To participate, you need to sign up for the official Ghost Recon site: Link
It has not been confirmed yet whether it'll be an open-beta or not. But Ubisoft CEO Yves Guillemot said last month that there will be an open-beta. So most likely the registrations are taken for an open-beta.
The game is scheduled to release on March 7, 2017. Don't miss the chance to try out the game before it comes out!