This is something I had made for a TTT community named Empyrean Gaming, releasing it to the public since I don't dev there anymore, and they have no problems with me releasing this.
Simply extract the package to your garrysmod folder. (where the materials, sound, models etc... folders are)
There's a clientside CVar named "ttt_dmsg_seconds" which tells for how many seconds the panel must stay on. (default is 5 seconds)
Me - all the coding
Whoever made the BebasNeue font.
Remember to report bugs, thanks.