It was revealed that G-Draong and Taeyang were ready to debut into the music industry a few times before they debuted with Big Bang. They confessed that they were originally planned to debut as a duo.
G-Dragon and Taeyang were guests on the 16th episode of Sketchbook, and they revealed that they were set to debut under the english name of "GD-YB" with their name's initials as the name of the hip hop duo.
Although, they planned to debut as a hip hop duo, Their agency's president Yang Hyun did not like their idea of debuting as a hip hop duo and debuted them as part of Big Bang instead.
G-Dragon said, "We made the group name ourselves, my name and his name's initials formed into GD-YB. I talked to our president about this idea of ours but he did not like it".
Source: TV report
Credits: Blueprincess824 @ Dailykpopnews
~~~ Good thing Yang Hyun did not like it eh? Imagine big bang without Taeyang and G-dragon O_o ohhhh YG is such a genius :)