How do I make a door that opens or unlocks when you activate an eleteric switch?

If you set the door as the switch's http://geck.gamesas.com/index.php/Reference#Linked_Ref, then you can get its refID via http://geck.gamesas.com/index.php/GetLinkedRef in a script attached to the script. You'll probably want to use an http://geck.gamesas.com/index.php/OnActivate block to detect when the switch is flipped, and you can use http://geck.gamesas.com/index.php/Lock/http://geck.gamesas.com/index.php/Unlock to lock or unlock the door, or http://geck.gamesas.com/index.php/SetOpenState to open or close the door.

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Alternatively (if memory serves, it may be wrong about it automatically unlocking) you can just set the switch as the activate parent of the door if you only need to lock/unlock it once to prevent the person from entering early or whatever.