Congratulations on your new ukulele and welcome to the world of baritone ukes. I really like the deeper and fuller voice of them in DGBE tuning. As others have mentioned, the chord shapes are the same but in a different key (the shape for a C chord on a GCEA uke results in a G chord on when played on a DGBE uke, the shape for an F chord on a GCEA uke results in a C chord on a DGBE uke, on etc.) As others have mentioned, you can play in the same key as Aldrine, who uses GCEA tuning, by either restringing your baritone to GCEA (like strumsilly, I'd recommend contacting Dirk as Southcoast (his UU username is
southcoastukes, in case you want to shoot him a PM) or by using a capo at the fifth fret.
Gordon Mayer of Mya-Moe made this video about the plusses and minuses of using GCEA tuning on a baritone uke.
Have fun with your new baritone ukukele!