I never understood, why was Gordon Freeman the "Right man in the wrong place"?

The G-man could control when and where Gordon would be removed from stasis, and in theory, he did make the right choice because as I see it, him and his benefactors want to get rid of the Combine, and Gordon did have success with that (Which is also strange due to the Alynx ending and her request). So why did he say that? What even are his plans anyway?

Sorry if the answer is obvious or if this has already been discussed before, but I am curious