My game plays perfectly fine, but there is something odd about it. Let me explain. In the bottom left corner it says "Postal 2: Steam - 5203" or something like that. Why doesn't it say GOG instead of Steam? I am aware that it doesn't matter, I am just curious. I do own both the Steam and GOG versions, but the GOG version is the only one installed on my computer right now. I played for over an hour straight using the GOG Galaxy Client and nothing was wrong with the game at all.
I am just wondering why my game says it's the Steam version when I am clearly playing Postal 2 via GOG Galaxy. Is it because the GOG version was updated to match the Steam version?

Ah, I see. Thank you for the response. I guess I was just worried for nothing after all.