GPL and forking

[Ioannis Vranos]

I am writing a GUI front-end for a GPLv2 or later, perl script, I can't
find the original author and I need to modify it, so as to work with my
front-end.

May someone explain when GPL forking can take place and how?

[MC Dooligan]

Post by Ioannis Vranos
I am writing a GUI front-end for a GPLv2 or later, perl script, I can't
find the original author and I need to modify it, so as to work with my
front-end.
May someone explain when GPL forking can take place and how?

Anytime, anywhere.