GUID conversion for RAW16 to number while Uploading data from text file

Hii Guys.

     I have created one ZTABLE table for upload GUID and Ticket number as per our requirement.

     I have used class cl_gui_frontend_services=>gui_upload for convert text to internal table.

     But issue is that, GUID is internally converted from RAW16 format to any numeric format.

     I have taken same data element CRMT_OBJECT_GUID as GUID which is in internal table.

     still it convert GUID to number format.

     Please help me if have any solution

Regards,

Kaushik Savaliya.