Giant Sequoia Germination:
1) Soak seeds in filtered water for 24 hours.
2) Place seeds in a zip lock bag filled with moist vermiculite. Then place inside the fridge to cold stratify for 60 days. Periodically check to ensure they don't dry out, but never wet them beyond moist.
3) Plant no more than 1/8" deep, and keep around 70-75 degrees. 
4) Expect germination within 2-4 weeks, keeping them out of direct sunlight for at least 60 days after germination.