For now is available only training mode with bots.
On June 20, Valve released a global interface update for CS GO called Panorama UI. This is the first major update since 2012, significantly changing the appearance of the game.
There are a lot of changes in the main menu, list of friends, lobby, leader list and inventory. On the main page there is a news tape, and the weapons and cases now animated.
Valve are going to release the Panorama UIin the next CS:GO update. Also there are some suggestions that this update will be available on public servers in about a week.
Beta version of the update is available for download via 7Launcher
To download the beta update, run 7Launcher and select the version: 1.36.3.9 Beta (Panorama UI)