It used to be distributed as a CD to university libraries, but these CDs were supposed to be surrendered when the online version came out. I have heard
that at least one of these copies (perhaps “out of date” in terms of “new” texts added since the web version debut) exists on some sort of distributed distribution network.
TLG is pretty easy to get hold of. You also want Diogenes, an app that allows you to use that database. It’s very useful if you study Latin or Greek, even as a hobby.