since blockchain.info does not control your private keys, they can not give you your BTG, you need to claim it yourself. there is a recovery phrase in blockchain.info which is like your seed, you can use that to get your private keys. (not sure about the details since i don't use it but it is possible).

BTG is not exactly a scam but not exactly a good for either. it is forking from bitcoin which makes it already bad since it is not from scratch. and also it has a premine which makes it even worse.