In Georgia, everyone operating a CMV is understood to provide consent for alcohol testing if stopped by the police. It is illegal to operate a CMV with a blood alcohol concentration (BAC) of 0.04% or higher. Even for a first offense, driving with a BAC in excess of this (or refusing to be tested) will result in the loss of your CDL for at least one year. The length of the CDL suspension will depend on the exact nature of the violation.
If the CMV involved in the violation was carrying hazardous material, the period of license suspension is three years.
You will lose your license for life if you are convicted of a second commercial driver license offense (such as any of the above-listed offenses) or for a first offense of using a CMV to commit a felony involving controlled substances.
That is a high price to pay and one that you should oppose at all costs by finding experienced legal counsel to present a robust defense.
Note that if you are found operating a CMV with any alcohol in your blood (even under 0.04%) you will be put out of service for 24 hours. Violating this order carries its own serious consequences, as detailed below.