German "ge-" before participe perfect

From: ghozzis
Message: 24962
Date: 2003-08-05

Hello!
I know that "ge-" is similar to latin "co-" and means something
like "with". But does anyone of you know why in German it is put in
front of the participe perfect, like in "gelaufen", "gesehen" etc?
Thanx for your answers!

Sacha Ghozzi