HomeKit Automations running only under some conditions?

Hello,
is there the possibility to run an automations only if some conditions are set, for instance if an accessory or a scene is off?

I am asking because I have created an automation that opens the main gate when I am arriving home. However I would like for this automation to run only if the gate is not already open.

I have then created a scene that tells me if the gate is open or closed.

How can I achieve this?
Thanks,
dan