So, you have turned on Pedometer on Galaxy S5 and want to see the number of steps you have taken on the lock screen? To view the Pedometer stats (count of steps) on the lock screen, do as follows:
1. Open Settings application
2. Under Device tab, go to Lock screen settings
3. Scroll down and open Additional information.
4. First make sure the feature is enabled, and then mark "Pedometer" option to see the steps you've taken since turning on the Pedometer