Importing GoPro Hero 10 videos to Apple Photos loses metadata

'Composite:GPSPosition' is not a real tag but a composite generated from other tags (i.e. datetime, sub second and offset can be in three tags but they all are generated in the composite tag, for example). So you might want to look for those other tags with either of these commands (their output should be about the same):

exiftool -a -G1 -s -n -ee '-*GPS*' movie.mp4

exiftool -a -G1 -s -n -ee -Location:all movie.mp4

Then copy GPS from it to 'Keys:GPSCoordinates'.

That said, later exiftool versions added the ability to use that 'Composite' tag as an input, too. So check that you are using the latest exiftool 12.44:

exiftool -ver

Then also this should work:

exiftool -m -P -overwrite_original_in_place '-Keys:GPSCoordinates<Composite:GPSPosition' '-Keys:Model<GoPro:Model' movie.mp4

I don't have GoPro but I happened to have a sample clip that starts like this:

exiftool -a -G1 -s -n -ee '-*GPS*' GX010385.MP4 
[UserData]      GPSCoordinates                  : -27.9994 153.4291
[Track4]        GPSMeasureMode                  : 0
[Track4]        GPSDateTime                     : 2022:03:01 12:53:21.935
[Track4]        GPSHPositioningError            : 99.99
[Track4]        GPSLatitude                     : -27.9994232
[Track4]        GPSLongitude                    : 153.429114
[Track4]        GPSAltitude                     : 2836.463
[Track4]        GPSSpeed                        : 0.733
[Track4]        GPSSpeed3D                      : 0.73
[Track4]        GPSLatitude                     : -27.9994228
[Track4]        GPSLongitude                    : 153.4291141
[Track4]        GPSAltitude                     : 2836.463
[Track4]        GPSSpeed                        : 0.733
[Track4]        GPSSpeed3D                      : 0.73
[...]

macOS 12.5 Monterey QuickTime Player or Photos.app do not read any of those GPS tags. But I can copy that UserData tag (and 'GoPro:Model') to Keys which can then be displayed:

exiftool -m -P -overwrite_original_in_place '-Keys:GPSCoordinates<UserData:GPSCoordinates' '-Keys:Model<GoPro:Model' .

Then there is that Track4 with lots of varying GPS but you'd better ask exiftool forum what to do with them.

I am glad you sorted it out.

Movie metadata is a mess. Different devices insert different metadata and different software display it to their own liking.

Apple devices and software currently seem to favor 'Keys' like:

exiftool -a -G1 -s -n -ee -Keys:all 2022-0612-1923-17.mov
[Keys]          LocationAccuracyHorizontal      : 4.691263
[Keys]          GPSCoordinates                  : -36.6101 -66.91515 119.9
[Keys]          Make                            : Apple
[Keys]          Model                           : iPhone 13 Pro
[Keys]          Software                        : 15.5
[Keys]          CreationDate                    : 2022:06:12 19:23:17+03:00
[Keys]          Author                          : Author
[Keys]          Description                     : Description
[Keys]          DisplayName                     : Title_primary
[Keys]          Keywords                        : Keyword1,Keyword2
[Keys]          Title                           : Title_secondary [displayed if the primary does not exist]

My gopro hero 10 doesn't have GPS composite in userdata key. This is what I have from Gopro

[Composite] GPSPosition : 46.677268 7.7683133

So I tried this:

% exiftool -m -P -overwrite_original_in_place '-Keys:GPSCoordinates<Composite:GPSPosition' TEST.MP4

Warning: No writable tags set from TEST.MP4

0 image files updated

1 image files unchanged

But its saying "No writable tags set"

I tried this and it doesn't work. It shows the name of the camera (HERO10) but not the location