recently, trend is ㄱg, ㅋk. So 불고기 is bulgogi, not pulkoki(this is an old style). Another 감자(potato) is Gamja, not Kamja. I hope this answer to help you. Thank, MJ,

ㄱ is a G ㅋ is a K It is just lots of people romanize it as K instead of G because it sounds like K a bit :)

It's a first for me to hear about the recent trend.... I'm also learning korean right now. And from what I've learned, ㄱis G if it is found directly before a vowel. And ㄱ is K if it is found directly before a consonant. But I'm also glad I read this one... Thank you to MR. MJ for the info... ^^a