We're a small bank, and don't have a "Compliance Officer" position; those responsibilities are born by senior officers in different areas of the bank.
So for something like Reg GG, our Operations Committee will oversee the Regulation. Officers from areas such as New Accounts, Bankcard, ACH etc. sit on the committee. Generally, the officer whose area is impacted the most by the Regulation will draft a policy, but it gets circulated to the other Officers for input and then to the rest of the Operations committee for review. We have an outside Operations Auditor that comes in and reviews our procedures for compliance issues.
Lucky me- I oversee our Bankcard Dept., and got the task of writing the Reg GG policy because my Department has to block transactions. But I worked very closely with the senior Officer that oversees our New Accounts because we have to have procedures in place for opening commercial accounts. Lastly, our Security Officer sits on the Operations committee, and she is responsible for any relevant SAR reporting.
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Let's start at the very beginning; A very good place to start...