You could probably get 0.000001btc per day which takes forever to reach 1btc. Give up the idea of mining bitcoin with GPU, that is what I am saying.
it doesn't stay consistent as the profitability goes down
GPU has been down so long most have sold their cards. It's sad but chances are you can sell off cards and buy BTC and you will get more BTC then it would ever mine.
For BTC mining you just have to use a asic now.