Rockstar Games have released the "Ill-Gotten Gains" content update for GTA Online, featuring a bunch of new multiplayer content like gold plated private jets. Like previous content updates, this has once again prevented script modifications from functioning. According to Alexander Blade, author of the original C++ Script Hook for GTA V, new protections against modding have also been added to the game.
As of Thursday, June 11, most modding functionality has been restored, and the latest version of the C++ ScriptHook which works with the latest update can be found here: http://gtaforums.com/topic/788343-vrel-script-hook-v
Edited by Sam