Not every integrator has the will, the resources or the knowledge to include parking and gate control as part of their suite of offerings. A few choose to dabble in it when necessary, farming out the tougher revenue jobs to companies that specialize in that. Others have discovered that once you know what you are doing there is a lot of money to be made in parking control.
Gate control as part of an access control system for employees is something many integrators will face, whether they are simply interfacing to it or installing gates and operators themselves. But it can get tricky.