Gravitational wave signals from compact binary mergers are of huge interest to the cosmology community due to their ability to act as standard sirens, providing distance measurements which are independent of the cosmic distance ladder. This opens up new ways of measuring cosmological parameters, with particular focus on the Hubble constant, with the hopes of arbitrating the current Hubble tension. However, in order for this measurement to be made, additional redshift information is required. When the merger produces an electromagnetic counterpart, allowing for its host galaxy to be identified, this is straightforward. However, in the scenario where the merger lacks a confirmed counterpart - true for all but one of the detections from the LIGO-Virgo-KAGRA collaboration to date - galaxy surveys, and the population of gravitational waves themselves, can be used to provide this missing information. I will introduce these methods and look at what we've learnt from the most recent catalogue of gravitational wave detections, and how they might pave the way for solving the Hubble tension.