I can no longer edit the first post, but I'd like to add that I've been alerted to a discrepancy in my GPS numbers-
Doug says:

Furthermore, my very simple Garmin won't do anything but addresses... so the nearest address I could figure for the gate location is:
51515 Mines Road Livermore, CA 94550
(it's actually in a different county than Livermore, but that's what my GPS told me, so maybe it'll help someone)
I can't guarantee the address will work for other methods of navigation than a Garmin. It should be close, though.

edit:
Google Maps says the address is 49400, so go figure.
Here's a Google maps link.