Blocking DC power to active GPS antenna
The component that you want is called a "DC block". You could also get a "bias tee" and leave the bias connection disconnected. Don't forget that you will also need an RF power divider that works at the frequencies you're trying to receive, and please note that not all power dividers will pass through DC. If you get one that doesn't, then you'll need to add the DC back in with a bias tee.