Credit for this freebie goes to awson from LEB - See the quote below for details if you don't want to follow the link describing the freebie. Be aware that Google may not approve your offer, and if they do it's likely that they will occasionally phone you up as per the terms and conditions.
If you don't know what this is for, this freebie probably isn't for you. ;)
Block-quote Check this out, Google are giving away free credit for GCE here: I just received mine earlier. It's an easy process: just fill in their form, once you get an email saying you've been selected, add a project to your account and enable billing (on both GAE and GCE), fill in another form, and you'll get the credits.
$1000 is enough to run a standard instance 24/7 for 6 months, but you can do whatever with it. Pricing is here: https://cloud.google.com/pricing/compute-engine
nice find, but too bad no proj big enough to test this on : (