According to ESP's site, the GB-4 has their "thin U" neck.
Interestingly enough, ESP/LTD's "thin U" neck profile has changed over the years. My early 2000s F-205 has the earlier iteration of their thin U and it is noticeably chunkier than that of my 2018 D-5 (which has the newer thin U profile). Regardless, both basses are lovely for me to play.
Interestingly enough, ESP/LTD's "thin U" neck profile has changed over the years. My early 2000s F-205 has the earlier iteration of their thin U and it is noticeably chunkier than that of my 2018 D-5 (which has the newer thin U profile). Regardless, both basses are lovely for me to play.