I have the Season Pass because I supported it in the Kickstarter program. Got it from GoG. I have the first 2 and have played them, but if I am correct, the 3rd episode has been out but I can't find it on GoG to download.I have trouble every time a new one comes out finding where to dl it from on GoG. Has anyone else had this problem and what do I do to get it?

The third episode was released in June. I know on Steam it automatically updated the game. Perhaps it's the same on GoG?

I think with GOG you have to download whatever installer they have listed on your download page -- and installing that will either update your game or install the whole thing if you don't have a previous installation. However they could certainly give better instructions.

There may be something more about it on the GOG forum.
https://www.gog.com/forum/the_longest_journeydreamfall_series

Thanks....I finally figured it out. I go through this each time a new one is released. They don't make it very clear. But...I've got it and love it so far!

I found it confusing as well. I downloaded the first two but did not install them. I'm waiting for a complete game. Went I went to GOG for chapter three there was only one set of files in my game folder. I assumed it was chapter three. Ok so what happened to chapters one and two? They were not there for downloading. Nothing on the web site spoke about it so I downloaded three and installed it without one and two on my machine. Those files representing chapter three installed the whole game, at least appears to because I could start at the beginning with only the newest file. I'm assuming all you need is the most recent set of files and there is no need to download each one, if you are like me waiting for the complete game. Simply download chapter five and go from there. Oh yes, I've been wrong before so believe this at your own peril.