hello I would like to know if it is possible to add two accounts of a same launcher on gog 2.0 for example I have two accounts uplay is possible? thank you in advance

I'm sure it's not possible right now.
Maybe there will be community made integrations for multiple accounts support.

IIRC, there's a thread here already where someone asked about this, and it was stated that they had considered supporting multiple accounts for the same launcher but decided against it and that there were no plans to support it.

yes it is possible but they will not do it because of laws

That's sad too hear. I am using two steam accounts aswell.
I really don't like switching 5 times a day or having to re-link the account in gog...

I am pretty sure I will most likely forget about all the games, that are not shown in the gog launcher.
For me, that is the only use of the gog launcher. To gain overview over ALL my games...