gdal_translate -gcp not recognised as an option

[MadMango]

These are my options for gdal_translate:

[-gcp,582.5825388724809 478.845703125 325929.3 673661.5,-gcp,629.8301934937457 489.337890625 325941.5 673663.484,-gcp,593.0820176772064 447.369140625 325933.23 673645.68,-gcp,639.0172374478806 455.23828125 325946.14 673648.55,-of,GTiff]

But I get an error from gdal3WebAssembly.wasm:

gdal stderr: ERROR 6: Unknown option name '-gcp'

Am I passing them in wrong, or is that option not available?

Thanks,
Mat