Gratney-Walis Hierarchical Aptitude Score

The Gratney-Walis Hierarchical Aptitude Score, also known as GWAS, is a score given at Unified Combined Military Boot Camp presumably designed to evaluate a recruit's ability to function in a command environment, as well as their ability to give and receive orders. It most likely serves as an indicator of command potential.

The future-Admiral Preston Jeremiah Cole scored a 94 during his tenure at UCMB, which was ranked "Exceptional".

List of appearances

 * Halo: Evolutions - Essential Tales of the Halo Universe
 * The Impossible Life and the Possible Death of Preston J. Cole