Global Mapper v24.1

Hi everyone, need some help, I'm using GMv20 and had problems with the projection

I have DWG files that contain 7 digit BRSO (Borneo) WGS84, and want to convert to Geographic (Lat/Long) so that I can use in Google Earth (GE), problem arise when I convert to Geographic because the default BRSO in GM is only 6 digits and the results in GE is projected very far away. At the right bottom GM stated as the coordinate is out of range.
Please advise & thank you.