@ wall-o-text above: Use Forge 953, IC2 344, and latest GT. Anything more recent than 953 is not for 1.6.4.
Also, make sure you're not on page 2/1 in NEI; that's a 1.6 bug.
Forge 953 doesn't work either. That was where I was before I got tired of not having recipes and started updating everything last night. Did notice the page 2/1 bug, but that is different. Once switching back to page one, the item appears, but it still gives no recipe (if IC2 or GT machine).
According to the Forge File Server (http://files.minecraftforge.net/)
11/21/2013 02:31:00 PM
Is the most up to date version for 1.6.4. They don't start the 1.7 version until Forge 10.12.0.967. Is GT not configured for Forge versions higher than 953? Considering they've moved on to 1.7, I assumed all authors that were still doing 1.6.4 updates would compile against the latest version since it wouldn't be changing anymore.