I beg the question -- just what is a Ralph Gibson? I Gooogoed the name and came up with nothing. I Gooogoed "Ralph Gibson Photographer" and pretty much came up with the same thing.
I don't know how you searched but I got numerous hits. Gibson is a well known inphotography, a familiar name around the world. Hang your head in shame and beat yourself severely with a 250 sheet box of FB paper. Seriously you need to do a lot of reading if you are really interested in photography. Learn about the greats before western civilization is destroyed completely.