Chip, I know its been a while, but I have actually finally located my George Aguillard in the census living with the Pourciau family in Pointe Coupee in the 1900 census.
I found a George A. Pourciau listed as being born in October 1890 (which is when George Aguillard was born) living in the household of Victorin Pourciau and Marie Ciphael Pourciau (maiden name also Pourciau!) Marie Ciphael was the niece of Rosa Major Aguillard, George's mother. Rose's sister Arthemise married a Jules Pourciau, and their daughter Marie Ciphael married Victorin Pourciau. I could find no other records stating Victorin and Marie Ciphael had a child name George, so George A. (A. for Aguillard no doubt) must have been my George.
I got further circumstantial evidence when I found in my deceased grandmother's bible a newspaper clipping for the obituary of an Elaine Pourciau Disney. I was able to trace Elaine as the the granddaughter of Victorin and Marie Ciphael. Elaine must have been one of George's "nieces" that my grandmother said used to visit him.