I'm trying to setup a timer for an event. Basically I want the timer to start at the beganning of the event but when the time goes out I want it to be game over. Can someone help me with this?

Lets see, first make a common event called
"GameOver"
Make it require a switch called "Timer On" and set it to parallel so it doesn't interrupt gameplay.
Create a conditional branch...if "Timer is less than or equal to 0 secs"
In true, add gameover command.
If false, leave that blank.
Also add a 5 wait frame so it doesn't lag.

Create the event now on your map that turns on timer, then after that turn on switch "Timer On"

Sorry for the sloppy instructions.
It should work fine though, let me know if theres a problem with it.

Thanks much. I'll test it out and tell you how it goes.