This ONLY works for people with "1" address's, not 3 --- is there any method to work for a 3 address?? Can I import my private key ("3") into a new electrum wallet that supports ("1") address's?
This is the problem... you have a "3" type address... also known as "Pay to Script Hash" or "P2SH".This type of address is typically used for "MultiSig" addresses which, as the name implies, requires multiple signatures from multiple private keys to be able to sign for messages. Due to this multi-key setup, they can often be difficult to port from one "chain" to another. Historically, they're also difficult to move from one wallet to another, as you can't just export a private key and then import/sweep that private key.
Additionally, Electrum generates "3" type addresses for it's "Two Factor Authentication" or "2FA" wallets.
Theoretically, it SHOULD be possible to recreate the MultiSig in Bitcoin Gold... but I suspect that at the moment, it would be a manual process and somewhat technical (ie. crafting raw transactions and signing them manually).