unsupported Canon PowerShot G12?

Good afternoon,

the Canon PowerShot G12 apparently is not supported. The device "mounts"
as USB mass storage.
System information:

        ~ $ uname -a
        Linux xxx 5.4.0-58-generic #64-Ubuntu SMP Wed Dec 9 08:16:25 UTC
        2020 x86_64 x86_64 x86_64 GNU/Linux

        ~ $ gphoto2 --auto-detect
        Modell Port
        ----------------------------------------------------------
        ...
        *USB PTP Class Camera           usb:002,005 *

        ~ $ gphoto2 --version
        gphoto2 2.5.23

        Copyright (c) 2000-2019 Marcus Meissner and others

        gphoto2 comes with NO WARRANTY, to the extent permitted by law.
        You may
        redistribute copies of gphoto2 under the terms of the GNU
        General Public
        License. For more information about these matters, see the files
        named COPYING.

        This version of gphoto2 is using the following software versions
        and options:
        gphoto2         2.5.23         gcc, popt(m), exif, cdk, aa,
        jpeg, readline
        libgphoto2      2.5.25         standard camlibs (SKIPPING
        lumix), gcc, ltdl, EXIF
        libgphoto2_port 0.12.0         iolibs: disk ptpip serial usb1
        usbdiskdirect usbscsi, gcc, ltdl, EXIF, USB, serial without locking

Any help highly appreciated.
Txs -Michael

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