There are
2,616 mi
from Garden Grove, CA to Gaithersburg, MD
That's the driving distance. It would take 1 day 22 hours to go from Garden Grove, California to Gaithersburg, Maryland.
The flight distance (direct flight from Garden Grove, CA to Gaithersburg, MD) is 2,274.81 mi.
2,616 mi = 4,210.16 kms