He added: "But I also fully understand and support that he should not expect someone to 'participate' in his gay wedding, if that participation violated an individual's religious conviction."
Peake, who was once part of Deal's legislative team, said in the email the idea "hits the heart of the matter of making sure there is no forced participation in a wedding ceremony, but also makes sure we don't allow discrimination against folks like my brother."
On Tuesday, Peake said his effort was part of an "ongoing discussion" to find a compromise. A spokesman for Ralston said the Peake proposal is one of many compromise efforts in the works.
"Speaker Ralston remains committed to working toward a solution that fulfills Governor Deal’s vision of a compromise that protects religious liberties without unintended consequences," said the spokesman, Kaleb McMichen.
Nathan Deal's forceful, biblical case against 'religious liberty' legislation
Gay marriage opponents win 'religious liberty' vote in Georgia Senate
More: The growing corporate backlash to Georgia's 'religious liberty' bill