Thank you for contacting Meraki GO Technical Support. My name is Tony and I'll be assisting you today.
I see that you are inquiring about naming and applying a port tag to a GX50's ports. Unfortunately, naming a port and adding a port tag is a feature available exclusively to the Meraki GO switches. Although this is not a supported feature, we take our customer feedback very seriously.
We encourage you to make a feature request by way of "Make a Wish". The most wished-for features are incorporated into product development and are used to shape product roadmaps.
Thank you again for contacting Meraki GO Technical Support.