I have now a QHY174 with GPS receiver included, but there is only a single Windows software (SharpCap) that appears to support the GPS insertion in the SER file.
I tested the camera successfully with INDI, but of course there is no GPS support for the camera. Of course this feature is very specific, but it would make INDI a very powerful tool for time-critical applications (such as stellar occultations).
I am ready to offer my collaboration for testing, if somebody can take some time to include the required feature in the driver.
Well, since this is an open source project, people work on things they like in their free time. There are several options:
1. Ask QHY to include this support in the INDI QHY driver.
2. Find a paid developer to work on this.
3. Wait until an open source developer is interested in this and has time.