Who is Frank Boyce, Gordy from Rogue Warrior and what is their importance?

Gordy is Richard's number 2 officer in the 8th Platoon in Vietnam. Gordy goes wild at bars, though he does not drink alcohol. He is known to bare his bottom, stuff it with a long stream of paper, have someone light the paper, and snuff it out just before the flames reach his bottom. Gordy is with Richard at the battle of Chau Doc.