when you are using Electrum, you have all your private keys and you can use them to claim your bitcoin gold or other similar forks in past or future!
for bitcoin gold your current only option (
https://bitcoingold.org/downloads/) is to either use the official wallet by the team which is a full node and you will have to download the whole blockchain which is bitcoin blockchain and the additional blocks that BTG mined so far which is around 150 GB more or less and then import your keys there.
or you can use the mobile wallets, there are currently 4 listed. Coinomi seems to be the popular choice.
do not use the web wallet, there were two and the one that is removed now seemed pretty shady to me. the current one doesn't have the option to create transactions and broadcasting them anyways!
note: send your bitcoins to a new address (wallet with new seed) before importing the keys in any other wallet.