Do you know that gitlab.com already offers free private repos ?
If you do, what are the features from this gold version that you are currently missing with the free version ?
I think it's a question of does signing up for gold for open source repos exhaust his free repos from the base version?
Definitely not. Presumably the gold subscription would be associated with a group for your open source projects, and your personal private projects would be completely separate (and free, just with Core functionality).
Yes, I know. I started using gitlab.com in 2014, I have there all my projects, my side projects, failed startup, assignments from uni, notes from lectures and own experiments, CV in Latex etc. Some of them I keep private, some of them are opensource. I enjoy hosting things myself, so my question is basically, can I replicate gitlab.com for my opensource projects, but keep privacy of my existing private projects.