Go Guilford Green
Every opportunity should be taken to "own" the core elements of the Guilford High School brand, including graphic components like typography.
Many brands, from corporations to universities to sports franchises, develop a custom typeface for the sake of ownership. A local example is the font the University of Connecticut uses predominently across their brand. Similarly, a custom typeface has been developed for Guilford – a conservative yet modern font made specifically to serve academic and athletic needs.