Just out of curiosity, how do I overclock my Gigabyte NVIDIA GeForce GTX 770? *Thanks in advance...*

I suggest asus gputweak. Overclock core first alone and test. Once that's stable do the memory. I say use 25 MHz bumps at a time and don't expect more than 200mhz on core and a bit less for memory. Overclock them separately to ensure each is stable on it's own .