Gift cards bought from "giftoff" Can only be used in UK. I also want to buy a gift card but which can be used in India.
I have recently bought a Google Play card of US, and use it outside US without proxy/VPN.
My method:
1. Register a new account (a new email)
2. Choose your country as US, but not your original one
3. Login to the new account at your phone
4. Choose 'redeem' at Play store, paste the code
5. It will ask for postal code. Just make up a 5-digit number for that
6. Done!
So I have a US account with $7.72 balance now though I'm not in US and don't use proxies.