GRFN_S_RANGE_DATE is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "Range value in Date" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_GRFN_S_RANGE_DATE TYPE GRFN_S_RANGE_DATE.
The GRFN_S_RANGE_DATE table consists of various fields, each holding specific information or linking keys about Range value in Date data available in SAP. These include OPTION (Selection Table Option), LOW (System Date), HIGH (System Date)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .