I removed everything but Galaticraft, NEI and Rei's minimap and it says
Ignoring visibility rule and showing launcher due to a game crash
Deleting /Users/jeremyhelbert/Library/Application Support/minecraft/versions/1.6.2-Forge220.127.116.114/1.6.2-Forge18.104.22.1684-natives-1377979939333113000
Right off the bat I can tell its a GC issue. This line here, for your future reference:
If there in an error log that starts with micdoodle8.mods... then chances are its an issue with Galacticraft.
It is an issue with NEI and Galacticraft. I took everything out, it worked, I put minimap back in, still worked. I put NEI in and I got that error again in the development console of the launcher. I pasted everything that was in the launcher console.
I had a problem when I tried to apply a mod with Galacticraft. I use a lot of the calclavia mods like ICBM, Mekanism, etc in a mods folder I've compiled myself. I was making sure everything was compatible, trying first Galacticraft and then adding other mods into the mix to make sure they work together. Then I added Atomic Science, and it crashed my game before it could even start and I don't know why. I know there was a basic components duplication problem, but I'm not sure where this leaves me.