There are a few BSG 2003 comic series, including BSG: Pegasus, BSG: Season Zero and also just the series simply entitled Battlestar Galactica (what gets confusing with the last one is that there were two with that title at the time of publishing, one about the origonal series and one about the remake and the titles did not specify. ) This is the one based on the 2003 remake.
In many ways, the BSG 2003 comic is like an AU fanfic. (Much in the same way the remake itself is in comparison to the original). It has the same characters and very basic storyline, but the relationships are tweaked and they events are very different. Boomer's character is the most different and as a rule, characters such as Geta and Tigh barely make an appearance. But it's still a good read.