I need to know if GitLab Community Edition hosted by IBM Bluemix include these features:
Calendars (Project): the ability to define project level calendars with non-working days and working days.
Calendars (Individual): the ability to define individual calendars for each resource with non-working days, working days and working hours.
Resource Usage: the ability to display the resource allocation on a daily/weekly basis.
Resource Levelling: the ability to either manually or automatically level resource allocations and adjust the schedule based on resource availability and assignment.
@Queralt Project calendars are not built in to GitLab, but you should check out the discussion on a related issue about calendar integration in general:
For resource usage you can use the time tracking estimates and spends, but this feature is probably not as robust as your requirements would likely require: