This app was mentioned in 6 comments, with an average of 5.67 upvotes
Android app dev here. /u/iminichrispy got the gist of how the buses are actually tracked. The Android app is similarly a product of my own work and is maintained in my free time and also uses the NextBus API (really not a fun API to work with). I additionally have a component that sits between NextBus and the app and does some route/stop aggregation and computation to produce the data used in the app. The Android app isn't OSS (yet?), but you can contact me if you have feedback or suggestions about it.
EDIT: Link on the sidebar, or right here: https://play.google.com/store/apps/details?id=me.siddu.betternextbus
If you have a smartphone (looks like the app is available for Android and Apple), GT Buses is an app developed by a GT alum and it updates most of the time the actual location of each of the buses across the various routes (including the GT-Emory route). That might help you in addition to the link /u/AllyYours shared that has the time tables for stops. As far as I know, they do not require you have a GT or Emory ID to use the buses.
Also GT Buses if you like gambling
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idk but I'm thinking if you install GT Buses and turn on notifications, it may do what you want it to do? https://play.google.com/store/apps/details?id=me.siddu.betternextbus&hl=en