Carole: I have not particularly followed John and William Gibason (Gibeson, Gibison, Giberson) families except what I've found in census and a few vital stats from Delaware records. The children I have found for John & wife, Mary Raymond, include: Alfred c1859, possibly md. 1882 Kate Gressinger; Sebastian c1864, md. June 1, 1887 Mary Nichels, d. 22 Jan. 1891 in Wilmington; John B. c1865, no info.; Mary L c1867, possibly md. Alexander B. Price 1886; Eva A b. 26 Nov. 1882, died young; and possibly Lucelia b. 6 Sept. 1872, no info.I have no death dates for John & Mary or burial location.
For William & wife, Elizabeth Johnson, both buried Hickory Grove Cem. Port Penn: Samuel c. 1858; Martha c1861 md. 1889 Frank Hickman; Emma c1864; Sarah b. c1868 md. Shelton; Lizzie May 1878-Nov. 1881; William Jr. no info; George c.1873-1931 md. Elizabeth Bennett; Catherine, no dates,md. McConnell. A correspondent gave me William's family info. with some names and dates.
I have no information on where Gibersons came from or any move to Pennsylvania.Hope this helps. Anne Rossell