How to convert a GIFTI texture to a Freesurfer format

Hello I have two Gifti files created with brainVisa, one representing the
surface of a cortex and the other being a texture. I was able to see the
surface in MNE by converting surface file with a freesurfer command :
'mris_convert surface.gii surface.pial' and I read it with
'mne.read_surface(surface.pial)'. How to do the same thing with a Gifti
texture ?

Thanks

Alexandre F
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use nibabel to read the gifti and get a numpy array you can use in MNE
/ PySurfer

HTH
A