George and family in 1880 were living in Alameda, Alameda, CA.
G. R. Miller, b. PA, 40, superintendent oil works.
Isidora, wife, b. NY, 30.
Maud, b. PA, 8.
George H., b. PA, 5.
Mary H., b. PA, 3.
J. C. Murray, brotherlaw, b. NY, 26, oil distiller [Isaidora's brother}.
George Barringer, cousin, b. NY, 21, oil distiller.
In 1900 the family is living in Alameda.
George R. Miller, b. June 1839, PA, widower, superintendent oil works.
George H., b. Dec 1874, PA refiner oil works, single.
Mabel H., b. PA Nov 1876, single.
Edith S., b. Jan 1881, CA.
Elwood J., b. Aug 1885, CA.
Ethel W., b. Aug 1885, CA.
Harold M., b. May 1889, CA.
John C. Murray, brotherlaw, b. July 1853, NY, stationary engineer.
Frank Onishi, servant.
You mentioned that you're seeking information but I found the Miller/Aitchison/Graham Family Tree and it looks like you're the author and it's very complete. If you're not the author it's located at trees.ancestry.com/tree/13769931/person/1425550200. Successful Searching!