I have my BTC in paper wallet at the time of fork will i get BTC gold?
Yes, If you use Bitcoin paper wallet you can still receive an equal amount of Bitcoin Gold of your total Bitcoin holdings as long as you have your private key. After the hard fork, to be able to access it you will need to sweep your private key (which are printed on your paper wallet) in a Bitcoin Gold wallet that supports it, Coinomi and Electrum wallet lets you sweep private key but I don't know if Electrum will support it or just wait for some announcement on how you can access your free Bitcoin Gold.