1. Is it possible to receive BTG by holding BTC at blockchain.info wallet?
2. What is the denomination of BTG: 1000mBTG=1BTG=100000000 Bitcoin Gold Satoshis?
3. If someone has 100mBTC at his wallet then what will he receive?
4. Where will BTG be stored? There is no a wallet for BCC at blockchain.info service, as for example to BTG
5. What is the current (speculation) price of 1BTG?
1. It is possible to claim BTG with a blockchain.info wallet, incase you have you're recocery phrase stored somewhere. You can convert the recovery phrase to a private key using a bip39 mnemonic converter. After the fork you could import the private key in a BTG client and claim your coins. But for safety, after the fork please move your Bitcoin Core coins to a new address. So when you would import your old private key you won't lose your core Bitcoins. Both coins would use the same private key if you don't move them.
2. Probably, I haven't see any information about it. You could send them an email, if nobody on here knows it.
3. An equal amount of BTG so, 100mBTG.
4. Coins will be stored on the same private key as Bitcoin Core coins. I think they will release a wallet client after the fork happens, which gives you access to your BTG when you import your private key.
5. Don't know, haven't seen it yet.