First of all, a global Object may or may not be the best way to do this. Have you looked at Item Metadata? Design Pattern: Using Item Metadata as an Alternative to Several DPs
I believe the best practice is to use configuration.py or create a module. Instantiate your Object when the module get’s loaded and import it into each of your scripts that care about it. I imagine you could implement some sort of Singleton DP if necessary.
But in general, I think having a global blob that you store a bunch of stuff into would be an anti-pattern. I suspect there might be more appropriate approaches.