As the title says, I have some questions which I would like to know an asnwer for.

I was given a laptop, shared by both my sister and her boyfriend. After I talked with him about GOG and GOG galaxy, he was interested this platform, so he asked me to setup galaxy with his account.

The issue is, while the guy want to make use of galaxy, my sister do not. They have both different accounts. As far I remember galaxy automatically scans for every gog game installed, but isn't this a problem if there are games installed with the offline installer which aren't part of the account used by galaxy?

My apologies if the question is a bit hard to follow, any help would be appreciated, thanks.

As far as I remember (and I don't use Galaxy myself, so can't verify) this won't be a problem. i.e. Galaxy might automatically scan and add games that your sister installed when her boyfriend logs in, but it won't cause any problems whatsoever. Her boyfriend can just ignore them.

I see. I do wonder though if this would cause disk usage for too long. Thanks fore replying though :)