So, just give it your best self-help effort to find them, and then let the GAL do his or her job.As far as an ejectment lawsuit, the real question is, was the property legally abandoned?

I would also discuss strategies with your lawyer for evicting/ejecting them if need be.

Can the new HB 182 law be used to eject the prior owners of a property that the bank foreclosed on and did not remove from the house after the foreclose?

You are not allowed to compound interest.If you bought the certificate from the state on a best price offer, you charge interest on your purchase price, not on the full amount of the taxes that were due, but were not paid by you when you purchased.After you obtained your tax deed, you are entitled to something called "mesne profits" if you file an ejectment lawsuit against the former owner and they redeem during that lawsuit.  

There is a one page complaint form "Complaint in Summary Ejectment" with clear instructions.

But that has its own issues as well including having to do a hybrid foreclosure/ejectment action. 

I can not do a execution of ejectment because the case was never filed in court.

Not checking the property periodically such that a squatter was living there long enough to require court action to eject them.

If things go sideways and the landlord/owner must evict the tenant/purchaser, a court could force you to eject the tenant. 

The remedy is eviction, not ejectment.