To be able to create a game logic, you need at least one soldier on the map
The game logic is created in exactly the same way as you would a soldier.
In the side select menu, having created a soldier, you will then be able to see Gamelogic in the pull down menu. (it isnt present until after a soldier is created))
side = Gamelogic
class = objects
non playable etc
Condition of presence = true
unit = gamelogic
Name (Remember what you type here, something obvious like M1Respawn)
and to make the Game logic for server side scripting, do exactly the same but call the gamelogic "Server"