probably will be brand specific the big manufacturers like trane or carrier will give you the option of factory mounted controls which will probably be a lon controller or a 24v interface to use somebody elses controls or just a themostat.
We have a couple of projects with Geothermal heat pumps, the PA Historical Commission loves these things. They have worked well in some cases and marginally in others, it all depends on well locations. They actually had problems with the wells warming in one case. The units came as previously mentioned, just 24V controls and you retrofit whatever you want. We have ALC on one job and JCI interfaced to ALC thru Modbus in the other.
Controls..some days your a hero, some days your a zero. Direct acting since 1992.