Taking remote through different O/S

Hello experts,

I want to know is there any inbuilt pkg in RHEL5 that can work as a "Teamviewer"

My requirment is to take GUI remote of my Linux machine from the internet in windows or in Linux machine.

is there any inbuild pkg in linux(by REDHAT) instaead of installing "Teamviewer" on my linux machine.

???????????????

Regards,

Parveen