If traveling I-5 SOUTH, take exit #114B onto CA-91 EAST toward RIVERSIDE, take exit BROOKHURST RD, make a KEFT turn, CONTINUE on BROOKHURST 0.8 mi, turn RIGHT on VALENCIA DRIVE, GMU on the LEFT SIDE of VALENCIA DRIVE.
If traveling I-5 NORTH, take exit #113A/BROOKHURST ST. toward LA PALMA AVE. 0.5 mi, turn RIGHT on BROOKHURST. CONTINUE on BROOKHURST 1.5 mi, turn RIGHT on VALENCIA DRIVE, GMU on the LEFT SIDE of VALENCIA DRIVE.