Gateway Antiques Center is easy to find going north or south on I-75. 

From Atlanta, take I-75 north to exit 353 (the last GA exit before Tennessee).  After taking the exit ramp, turn left onto Cloud Springs Road.  Travel about 200 yards and take a right onto Roadway Road.  The driveway to Gateway will be on your left.

From Chattanooga, follow I-75 south (towards Atlanta) to GA exit 353 (the first GA exit).  After taking the exit ramp, turn right onto Cloud Springs Road.  Travel about 150 yards and take a right onto Roadway Road.  The driveway to Gateway will be on your left.