I'm scheduled to do the Shiner GASP ride this year (2016) however after riding the Muenster Germanfest metric century, and dealing with the climbs I'm a little concerned that I may not be able to handle the elevation of Shiner. Is there anyone who has rode both Shiner and Muenster that can give some indication of how comparable both courses are?

this is only 1/2 an answer but might be some help. I've done Shiner GASP and even as a flatlander I didn't have any issue with hills. The last 20 are a little rolling, but it was the least of my concerns at that point.