Local Clubs:
Montgomery Kennel Club
Huntsville Obedience Training Club
Resources:
AKC Obedience Regulations
AKC Rally
AKC Dog Show Search Page
This is an article on the AKC site. It holds a detailed description of the test. It also explains the philosophy behind the Canine Good Citizen program.
Other:
The Montgomery Humane Society
Prattville/Autauga Humane Society
The Humane Society of Elmore County