Hi @Anonymous
Can you clarify exactly the GDPR consent message that you intend to display?
In terms of data protection, the usual thing to do is to request consent from the employee at the time when you collect the data, not at the time when you display the details through an app.
If it is necessary for you to process this employee data in order for you to fulfil your obligations as an employer (eg, payroll), that consent is usually implied.
In general, I would say it is not necessary to display a consent message and I have never seen messages of this nature in the internal systems that I have worked on.
Just to cover myself, I am not a lawyer and what I say here is my opinion, and not legal advice.