Is this the record which the death date currently shown on Geni is taken from?
http://hiski.genealogia.fi/hiski?en+t5581222
I take "Gl" to be an abbreviation of "Gamli" derived from swedish "gammal" for old which would match the Finnish nick-name "Vanha"
Gl = gammal = vanha
Lars = Lauri
Terwo = Tervonen