Stoa.org has a great list of all the author abbreviations in the LSJ: LSJ abbreviations
. For this one:
] Ed. G. Loewe, G. Goetz & F. Schoell, Corpus Glossariorum Latinorum
, Leipzig 1888-1924.
Edit: woohoo! It's on Google Books, or at least part is: Corpus Glossariorum Latinorum
. It looks like pre-modern Greek-Latin dictionaries.