You can brighten them up in the game, with the EV level.
For the computer, there's Paint Shop Pro and Photoshop, but you have to buy those. There is Google Picasa 2 (Google it if you don't know what it is) that'll brighten them up, along with contrast and saturation and other things. Plus it's free. 👍
For the pics, the last three GT's are decent, but the others are way, way too dark.
Also, can you visit my gallery, and comment if possible?
I´d not say there are no nice pics. Sure they are too dark, and if they were brighter they still were not really breathtaking. But, from what one can make out, they surely are something to start with.