Thanks for the reply.
The gate type in use at the specific airport I’m trying to adjust is the Large Ramp type. This has air stairs accessing the larger aircraft instead of jetways.
I’m trying to find a way to not have the Catering truck and pushback tug at the gate since the ramp is a bit tight for taxiing an a320.
I’m fine with all gates at a specific airport not having those specific vehicles- if such an option exists.