antiafk.ahk:
[CODE]
THE_KEY_YOU_WANT_PRESS_AFTER_13_MINUTES = z ; Or y on QWERTZ, best option, didn't make any problems and prevent AFK.
GameTitle = Grand Theft Auto V
WinGet, PID, pid, %GameTitle%
GTAPid := pid
Ticks := A_TickCount
while(pid > 0) ; While GTA is running
{
    if (A_TickCount - Ticks > 780000) ; 13 Minutes
    {
        WinGet, PID ,pid , A
        if (GTAPid != pid) ; Activate GTA Window is not in Foreground
        {
            WinActivate, %GameTitle%
            sleep 2000
        } ; Send Key
        Send {%THE_KEY_YOU_WANT_PRESS_AFTER_13_MINUTES% down}
        sleep 10
        send {%THE_KEY_YOU_WANT_PRESS_AFTER_13_MINUTES% up}
        Ticks := A_TickCount ; Reset Ticks
    }
    WinGet, PID, pid, %GameTitle% ; Check if GTA is still running
}
[/CODE]