Here is what UCB states about High Demand Majors:
High demand or “impacted” majors have restrictions on declaration, usually due to demand exceeding the capacity of the major. These restrictions might be particular GPA requirements, require a minimum grade in a specific course, or have elements to the declaration packet beyond grades.
So based on this information, if you do not select a High Demand major as your first choice, there is a possibility that you may not be able to declare/pursue the major later after admission.
If Global Studies is what you want to study, then list it as your first choice.