GIT and Module Suite Project

Hello everybody,

I have an old module suite project named timekeeper which I upgraded to 
NB8.2 and Java8. It contains 42 library wrapper modules and 33 java 
source modules.

Now I installed GitLab on my QNAP NAS and want to use it as a source 
code repository.

Can anybody tell me how to set up the project structure in GIT that I 
can treat the whole module suite as one unit?

Thanks in advance

Hermann