BossAreaForum

This is available for download - for pay - at Scribd but I'm sure it was originally available free, since I had a copy years ago.

Is the site legit? And, if so, is this now the only way to get hold of a copy? I could do with one, since mine was trashed in a HD crash some time ago. It sticks in my craw that this thing, old as it is, should be something that has to be paid for now. I even tried to sign up with 'em to buy it but for some reason, the site wouldn't recognize my card, which is a plain, vanilla, regular ordinary every day debit card.

If anyone knows of a legitimate way to obtain this thing, other than at Scribd, I will be very grateful.

I don't know what you mean with "unofficial", but you can download the majority of BOSS product manuals for free right here at the main source:

https://www.boss.info/global/support/owners_manuals/

The "official" GT-3 and GT-5 manuals are supported as well.

Thanks but not that one. I have that anyhow. This is - as I said - an unofficial one. Made by GT-3/GT-5 users, and goes more in depth than the Boss one, and is better written, IMO.

Okay, now it's clear what you meant.

I have many of these files, they are sometimes available in small windows of time from a previous era of the internet all have good info about the GT-5

05Boss GT-x Set-up v02.pdf
gtx.pdf this might be the same file as above its different size but I don't notice any difference
Boss_GT_8_Brilliance.pdf most of the ideas contained in this apply to all GT pedals
_GT-3 vs GT-5 Comparison.pdf

mediafire link

Thank you so much! Whether the files are the same as the one I'm after or not, I'm certain they'll be a useful set of resources.