How do you find players on the Gatling Engine? There's a couple different ways.
(don't have the engine yet? Get it here: http://www.ccgworkshop.com )
One, leave a message in the chat window itself indicating when you'll next be on.
You can also use the Game Wall feature.
It's on the tab on right side. It's busy retrieving stuff in this image, so you don't see messages yet. Once it loads, you can see messages people have left. They persist longer than ones in the chat window, but not everybody remembers to check the wall.
At bottom of that, you can also see a check box that says "e-mail me when someone wants to play this game."
CHECK THE BOX.
You'll also see a button that says "e-mail". Hit the button, it sends an e-mail to everyone that's clicked the box. Now this won't always immediately summon a player, but the more people that sign up (CHECK THE BOX!) the better odds get that it'll work. Not everybody obsessively check e-mail, but if you have an instant messenger program, it'll frequently alert you to fact you have e-mail.
Even if it doesn't summon players consistently, it DOES let other players know when you were on looking for game.
Use the Game Wall!