GNU Radio itself is not and SDR, it is a framework for developing SDR applications… Anyhow, there is a gr-gpredict-doppler block for GNU Radio, which can understand tracking data from gpredict, although I do not know the present status of this project and how well it works with the latest GNU Radio.
As for specific SDR applications, Gqrx has built-in support for receiving tracking data from gpredict, and there is also a plugin for SDR#.