UPDATE: Did I lose my BTG forever?
Ok now I'm totally confused, did I lose my BTG forever? Because --- I just imported my private key from my Mac electrum wallet which contained the "3" address and I imported the associated private key to my Dell PC Electrum wallet and created a new wallet through the standard set up and imported my private key.... now my private key that was on my Mac has a "1" address... but when I look up the "1" address the explorer doesn't return a result... but when I go back to view my "3" address I still see the BTG
Did I lose it forever since my new electrum wallet reassigned my private key to a "1" address?

Hi you did not loose the coins, you only have to wait to coinomi wallet, they are working actually in support segwit and multisig address, you can see more info here:
https://coinomi.freshdesk.com/support/solutions/articles/29000017747-i-can-t-sweep-my-btg-private-keyit only need some time and you will be capable of get back your BTG´s