In theory, the initial value of GPUC should be 71.51792382BTC 325,000,000 coins (the IPO amount and the number of coins issued), for a value of 0.00000022 BTC per GPUC.
There will be 28,800,000 new GPUC mined every day (20,000 GPUC x 60 blocks/hour x 24 hours), meaning that the IPO holders have 11.28 days worth of coins at the outset. This puts the IPO holders quite firmly in control of the value of this coin... anybody would be a fool to sell at less than cost, and they hold enough of the market share (still 50% of the market after 11 days) to be able to set a good sale price for GPUC.
As to actual value, as it stands right now, it sounds like the CEO was able to order 80 GPUs. If we assume that he spent the entire IPO on them, that would leave each GPU worth 4,062,500 GPUC (325,000,000 GPUC 80 GPUs) at most.
What happens to the value of GPUC once it hits market will be anybody's guess, but I would assume that as long as the IPO holders do not dump that the price will remain higher than 22 satoshis and GPUs will hopefully go for a couple hundred thousand GPUC instead of 4 million.
With its unique purpose of being used to buy GPUs, I don't think market cap or any other tool for comparison to other coins is useful in any way. At the end of the day, the only numbers that really mean anything are these:
How many BTC ('y') can CEO get for 'x' GPUC,
How much USD$ ('z') can CEO get for those 'y' BTC
How many GPUs ('g') can CEO get for those 'z' USD$
And fair market price = x/g (plus a bit of markup for the business)
The market will determine what it sees as a fair market price for GPUC, and the cost of a GPU in GPUC will fluctuate according to the exchange rates of GPUC/BTC/USD$, and I don't think there is any way to set a particular price point as long as those currency exchanges need to be made.
Great analysis.

I for one will be holding my initial IPO shares for a long while as I'm looking at this for the long term. What I like about this coin is that it won't be solely based on speculation as all the other coins are. If this coin turns out to be a huge success, it would be the biggest come back that I've seen in altcoin history.