VGPR was an utter disaster for them. At about 2 cents or so, they called for $0.10-$0.15, it hit about .03-.04, and then has tanked ever since.
On the flipside, BRYN went from 0.03 to about $0.80. It has since fallen back to about $0.15. I have been on both side of the PSC coin.
I think with PSC you have to be in early, hold for a short period of time, and then if things tank, pull the chute.
As for GDHI, this company doesn't seem to have the usual PSC markings. There appears to be a clear business plan in place for the company, and the CEO does appear to be forthright and open about information. Come on...how many other PSC picks have gone forth with a con call that provides an update on the company, and then takes extensive questions from people who he has never met (or has had an opportunity to "script" questions from the crowd). There is a huge risk for a company that doesn't have their ducks in a row to answer that many questions. The CEO, Frank did a great job.
If you haven't listened to the conference call, you should do so. It is well worth the time. I am still laughing at the guy who asked the question about a mining company with a similar name.