ArchaeoBlog and Archaeologica are (with Google) the spots were a good many links are found for GGG. ‘Blog had an interesting little tidbit about the Wayback Machine:
Internet Archive Search: ancient Egypt
http://www.archive.org/search.php?query=ancient%20Egypt
One problem I found, with the text version of a Petrie book, was that the OCR wasn’t too good, and it was obvious no one had proofread it. Of late I’ve been trying to hunt down a reference I have somewhere around here — Petrie documented an inscription inside (if memory serves) the Grand Gallery of the Great Pyramid. It has since flaked away, but referred to a specific regnal year (something to do with the cattle drive I think) and perhaps explicitly to Khufu. The interior of the Great Pyramid used to be plastered and frescoed, just as its exterior was (according to at least one ancient historian) covered with limestone trim blocks, and an inscription was carved into those.