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How-To Instructions here: https://www.rtl-sdr.com/rtl-sdr-tutoria ... -plotting/

Make use of those pesky GPS signals @ 1575.42 Mhz

In short, it works quite well!

I purchased a $9 GPS patch antenna on Amazon (with SMA connector) -- these have a LNA built-in and require 3-5vdc. The RTL-SDR v3 can provide power with a simple command line utility -- which turns on the internal BIAS-T power. (The older RTL-SDR dongles do not have the BIAS-T option.)

The antenna is magnetic so I just stuck it on the lid of a food tin that is about 8" in diameter and pointed it up toward the sky. If I was out in an open field then it'd probably pick up 3x as many GPS birds but the house is blocking most of the northern sky so will have to make do with whatever it picks up.

There are a couple of Windows applications to download. Entering in your GPS coordinates will definitely give you a faster lock. Just remember that for the western USA, the Longitude is a negative value.

Since the GPS sats are moving the SDR will lose lock and you'll have to wait a few minutes for it to reacquire the lock. The attached screenshot only took about 2 minutes to acquire those 5 GPS sats. After about 20 minutes, I had 8 GPS sats on my scope.