33455 6th Avenue South
Federal Way, WA 98003
Tel: (253) 943-4200
Fax: (253) 943-4021
From downtown Seattle, take Interstate 5 south to exit 143, S. 320th Street, toward Federal Way. Turn right onto S. 320th Street. Turn left at WA-99 South. At S. 336th Street, turn right. At the second cross street turn right onto 6th Avenue S. GCC is located in the Kiewit building on the left.
From the south, take WA-99 North to S. 336th Street. Turn left. At the second cross street, turn right onto 6th Ave. S. GCC is located in the Kiewit building on the left.
3838 West Marginal Way SW
Seattle, WA 98106
Tel: (206) 938-6750
Fax: (206) 938-6766
Driving north toward Seattle on Interstate 5: Take exit 156 for WA-599 N toward Tukwila/W Marginal Way. Take a slight left at WA-599 N. Continue on WA-99 for 3.1 miles. Continue on West Marginal Way and continue on Highland Park Way SW. Turn right at West Marginal Way SW.
Driving south toward Seattle on Interstate 5: Take exit 163A to merge onto W Seattle Bridge. Take the ramp to Harbor Island and merge onto S Spokane St. Turn right toward West Marginal Way SW (signs for W Marginal Way SW Southbound). Turn right at West Marginal Way SW.