gps3 does not have any dependencies (#14)

Absolutely correct, a house of mirrors.

setup.py

@@ -75,7 +75,7 @@
     # your project is installed. For an analysis of "install_requires" vs pip's
     # requirements files see:
     # https://packaging.python.org/en/latest/requirements.html
-    install_requires=['', 'gps3', 'misc'],
+    install_requires=[],
 
     # List additional groups of dependencies here (e.g. development
     # dependencies). You can install these using the following syntax,