Gorp is a mixture of peanuts, raisins and M&M's. A lot of backpacker's will have a good breakfast, hike all day snacking on "gorp" and have a good evening meal when they camp.

I wouldn't recommend a steady diet of the following but for what this post is asking they work:

http://beprepared.com/product.asp_Q_pn_E_FM%20R100_A_name_E_DATREX%AE+2400+Calorie+Food+Bar

http://beprepared.com/product.asp_Q_pn_E_FM%20R240_A_name_E_MAINSTAY%99+2%2C400+Calorie+Food+Bar

http://beprepared.com/product.asp_Q_pn_E_FM%20R200_A_name_E_2%2C400+Calorie+S%2EO%2ES%2E+Food+Bar

http://www.survivaltabs.com/

http://www.clifbar.com/