I was already aware what you have posted which ofcourse did not answered my question. What I came to know now is, from GPL-3.0/5.c > This License gives no perm

I was already aware what you have posted which ofcourse did not answered my question. What I came to know now is, from GPL-3.0/5.c > This License gives no permission to license the work in any other way, but it does not invalidate such permission if you have separately received it. which does answer it.