FPGA is another kind of system like an ASIC. I am assuming you mean a GPU?
If so then yes. Most any card can mine. How well they can mine is a different story.
https://en.bitcoin.it/wiki/Mining_hardware_comparisonCheck out there and you will be able to see what kind of speeds you can expect.
You can also google "btc calculator" and use that along side your speed to estimate your earnings.