Recently, the Great Dictionary of Standard Korean (표준국어대사전), the de facto arbiter of Standard Korean usage, has revised its entry for 김밥 gimbap so that the common pronunciation as [ɡ̊iːm.pap] featuring fortition of the initial consonant of the second element is also recognized as standard, next to [ɡ̊iːm.bap] which was previously considered the only correct pronunciation.
You can read more about this change on the kkeutsori blog: ‘Two pronunciations now accepted for “gimbap”‘.
The Food and Drink page of the Korean pronunciation dictionary on this site has been updated accordingly. Previously, the common pronunciation [ɡ̊iːm.pap] was marked as discouraged with the down arrow (↓), but this has been removed.
- 김밥[김ː-] gimbap (seaweed and rice rolls) RR: gimbap MR: kimbap /ɡiːm=bab, ↓ɡiːmʔ=bap → ↓ɡiːm.pap/ [ɡ̊iːm.bap, ↓ɡ̊iːm.pap]
- 김밥[김ː-/김ː빱] gimbap (seaweed and rice rolls) RR: gimbap MR: kimbap /ɡiːm=bab, ɡiːmʔ=bap → ɡiːm.pap/ [ɡ̊iːm.bap, ɡ̊iːm.pap]