Bike Walk Savannah – This is the local non-profit for cycling and pedestrian advocacy in Savannah. Formerly known as the Savannah Bicycle Campaign.
They also have a great Bike Savannah Guide:
Georgia Bikes – This is a major non-profit that advocates for cycling safety and cycling-friendly laws.
The League of American Cyclists – This is a national lobbying group for cycling in America.
Georgia Governor’s Office of Highway Safety Pocket Guide to Bicycle Laws
Georgia DOT Bicycle Safety Page
There are also numerous bike clubs in Savannah:
Coastal Bicycle Touring Club