I am pretty sure these are hand lettered and the identical characters in the album cover are simply cut-n-pasted, but you never know in these days of feature-rich OpenType wizardry. ;^)
Typophile
Interesting curly script on Laura Gibson album sleeves
I had a look at it, a few similar L but the G is rather unique.
You could be right with your assumption... ;-)
Captured from web.archive.org on 25 Jun 2012. view this capture