It seems to be a powerful group, as it managed to reach the New World. Bartolomeo has a high bounty on his head, giving him the status of a super rookie.
However there is some difference between the strength of the various members. While Bartolomeo easily defeated a vice admiral, Gambia was defeated by the same man.
The captain of the crew, Bartolomeo, first set sail after seeing Luffy's participation at the Battle of Marineford. He became a very promising rookie, earning his fame around one year after the war.
Later, just before Block B began, the vice admiral was defeated by Bartolomeo and left inside the garbage room.
When the fight for Block B started, Bartolomeo was teasing the crowd and sitting lazily watching the other contestants fight. When the fight was about to be concluded, he used his Devil Fruit ability to protect himself from king Elizabello II's punch, and then once more to defeat the king, thus winning the fight in Block B.
In the original Shonen Jump version of Chapter 705, Gambia's infobox stated that he was a staff officer of the "Bartolomeo Pirates" (バルトロメオ海賊団,Barutoromeo Kaizokudan?). In Volume 71, this was corrected to match Bartolomeo's infobox in Chapter 706, which stated that the crew's name was the Barto Club.