Though I know he was born in Chicago, Cook county, Illinois, I haven't found him on the Illinois Cook County Birth Certificates 1878-1922 database at the Family History Library pilot search site. I'm not overly concerned about that at this point since the only one I've found there was the first Chicago-born child, Mary Anna.
Looking at the census records for George creates at mishmash of a time line:
1900 - in his mother's household listed as born Dec 1883, age 16
1910 - in his mother's household listed as age 25 [1910-25 = 1885]
1920 - head of household (at same address) listed as age 32 [1920-32 = 1888]
1930 - head of household (at same address) listed as age 44 [1930-44 = 1886]
The cemetery plat record from Rosehill Cemetery in Chicago shows him as age 64. He died 12 Mar 1949. [1949-64 = 1885]
But, and here's the kicker, on his WWII draft registration his birth date is listed as 29 Dec 1880, age 61. Just as clear as day, mind you! Not more than five lines above his signature! Another interesting thing about this document is that he listed his daughter, Helen, as his contact person even though his wife was still living. The information was taken 27 Apr 1942.