Coordinates and orientation issues for converting gii surface to freesurfer surface

Dear AFNI experts,

I used Isosurface to create a gii surface of marmoset monkey.

I wanted to convert this surface to freesurfer (fs) format so that I can create a flat map using freesurfer.

However, no matter I used Isosurface to create a (-o_fs) fs surface directly, or using ConvertSurface, the resulting fs surface has a wrong orientation than the volume image.

I attached a screenshot, where the left is the correct gii format and the right is the incorrect fs format.

I also attached the volume image and surface file via:

Thank and look forward to your help!