Right now, is there any way to access your BTG from your private key/seed from BTC?
If you have BTC on your seed you must move it to another address (owned by another private address). Then you can import private key in bitcoin gold wallet and you will have access to it. BUT FIRST move your BTC !
I know that mate, but I don't know which wallet supports the private key/seed importing to access BTG.
Which wallet are you using? Because first you have to get your private keys from that wallet. After that import it to any BTG client which can be found on their site here: https://bitcoingold.org or run a full node because most wallets listed there are for android/ios. You can also wait for the forked version of electrum for BTG, just like electron cash in BCH.
But if you're planning to do it now. Coinomi is what I recommend. Here is a tutorial that coinomi provided: https://coinomi.freshdesk.com/support/solutions/articles/29000016909-i-didn-t-have-btc-in-coinomi-at-the-time-of-the-snapshot-how-do-i-claim-btg-
