You could download each blockchain, or you can just use a lightweight SPV wallet such as Electrum to spend the coins - if there is any - since you may only want to dump the other coins and downloading the whole Bitcoin Cash chain would be a waste of your HD space and time.
Those wallets doesn't require you to download the whole Blockchain:
Bitcoin = Electrum.
Bitcoin Gold = Electron Cash.
Bitgold = none available so far.
I think there is a 3 wallet option for bitcoin gold posted by official site of bitcoin gold here
https://bitcoingold.org/1. is Coinomi
2. Guarda and the last one
3. freewallet but still press release
So i think you can claim both bitcoin cash and bitcoin gold in coinomi if ever you wanted to claim your fork coins..