Activision announced that it is in the process of terminating the GHTV mode within Guitar Hero Live. As of December 1, 2018, GHTV will no longer be available to play. On that date, Activision will terminate the service for GHTV and servers will be shut down.
Console versions of the GH Live mode will continue to operate as usual.
Some changes have already been made. As of June 1, 2018, iOS versions of the Guitar Hero Live game for mobile is no longer available for download via the app store. Players who currently own the app and have it installed on their device can continue to play the GH Live mode on their installed device (through November 30, 2018). Activision points out that if you update your iOS software, the app may no longer be supported.
Also as of June 1, 2018, all GHTV in-game purchases will be turned off. Activision says players can continue to use their Hero Cash and items on hand until the GHTV sunset date of December 1, 2018.
Activision states that players can still enjoy GHTV and all content in the game mode, including Premium Shows, through November 30, 2018.