You met with the Realtor &" finally found a house". Did you ask to see this particular property or did the Realtor find it based on the criteria of what your friend was looking for? In other words, did you do ALL the research, including pouring through who knows how many listings, set up the appointments to view the homes with the other agents, once a home was found, establish the true market value of the property through active, pending & sold data? Prepare the contract? Set up ALL Inspections? etc, etc, etc.
Who brought up the finder's fee? You? Your friend? If you are doing a "favor" for your friend & there was no talk of money BEFORE they made an offer, then why now? If your friend willing to pay this finder's fee? I don't believe the Realtor should.
You are doing your friend a favor here, don't now muddy the waters on their property purchase for your personal gain. This could get messy.
You can certainly ask...
A "finder's fee" is different than a commission even though it may "quack like a duck". However, the state of GA has specific statutes that may say it's a duck....
That being said, your friend is able to negotiate with the agent, and can negotiate the commission. They are free to pay you a consulting fee etc. I agree with some of you other answers regarding working with an attorney so you are totally sure you are in compliance with GA statutes.
The basic idea here is neither you nor your friend have any right to any part of the commission. If you or your friend feel otherwise, then, I suggest you seek legal counsel.
All the best,
However . . .
It could be structured otherwise. Perhaps as a consulting fee. Or marketing services. Check with a lawyer on what to call it and how to structure it.
Hope that helps.