I guess it is classified as a religious movement as it is premised on Islam for its values.
The term religion here is used more broadly than a "personal secular faith" - more akin to ideology, lifeway or discursive tradition.
Imran Khan's first public address after elections envisioned setting up a Medina-like welfare state which would be sympathetic towards widows and the weaker sections of the society.
"I want to share the kind of Pakistan I envision - the type of state that was established in Madina, where widows and the poor were taken care of. My inspiration comes from the last Prophet who set up an ideal welfare state in Medina. I want Pakistan to become like that. A humanistic not an animalistic state."
The prophet's medina was a religious state, built on Islamic principles, laws and policy making.
The unusual nature of the issue is why he doesn't adopt the Islamic system of governance, the caliphate; he seems to be adopting aspects of Islam and fusing them with a feudalistic secular republic which seems to be for retaining the status quo, entrenched interests, rather than challenging and restructuring them.