How do I operate the Monero GUI as a 'cold' wallet from an air-gapped computer, especially in the context of validating a send transaction created from a hot wallet? I've read the other Q&As on this subject but I only saw ones that are for the CLI, not the GUI. I poked around the 'Send' tab but didn't see any options, so I just sent it out as a regular transaction while in 'Simple' mode. Is using a hardware wallet with the Monero GUI that is connected to the network considered 'cold' enough since the hardware device is holding the private spend key? Is there even a way to run the Monero GUI without it connecting to the network?
***UPDATE
I read the other question posted as possibly similar but it doesn't address the airgapped computer aspect of my question so I'll ask it again, in a slightly different way:
Can the Monero GUI run in an airgapped computer without connecting to the network? From what I understand, all three modes (Simple, Simple+Bootstrap, and Advanced) need to connect to the network.