due to some network limitations I get this error while installing google chrome from rpmfusion repo:

GPG key retrieval failed 

I have also the gpg key of google chrome downloaded from the same url that yum is trying to download from, on my system. I installed google-chrome using this command:

yum install google-chrome-stable --nogpgcheck 

And it was installed successfully. Now I'm interested to know is there a way to validate the installed package using the gpg key file I have and the cached package of google-chrome in /var/cache/... ?