What about Canon, Nikon, Panasonic, Fujifilm, Pentax, etc.?
Gyroflow supports all cameras that record gyroscope data. Consumer cameras such as those from Canon, Nikon, Panasonic, Fujifilm, Pentax, etc. don't record gyro data internally, and therefore cannot be used with Gyroflow.
Gyroflow requires the camera to have a hardware gyroscope and to record it together with the video file - so there's nothing we can do on the software side, if the camera didn't provide the gyro data. This is not something Gyroflow developers can fix.
You can try to reach the camera manufacturer and express interest in adding gyro data. If they see enough interest, they may add that functionality to the camera.
However, it is possible to use an external gyro source with cameras that don't record gyro data internally. You can learn more here.