Cheryl, I have quite a bit of research information on the particular George GARNETT and his wife Sarah S. [nee HIGGINS] GARNETT that you are looking for.
By the way, this George GARNETT was born in July 1847 in Charlotte County, New Brunswick [not in Prince Edward Island].
George and his younger brother crossed over from the southwestern part of New Brunswick to Maine in the late 1860s and George lived for a while at Princeton, Washington County, Maine before moving to Aroostook County at some point between 1870 and 1873. That was where he met and eventually married Sarah S. HIGGINS, daughter of Sabine and Sarah P. HIGGINS of the town of Sherman in Aroostook County.
If you get in touch with me directly by e-mail, I'd be pleased to fill you in on George GARNETTs line of ancestors as well as several generations of his subsequent descendants.