DAX - Dynamic Field Parameter Grouping

 1 - Create Dynamic Table (Modeling -> New Parameters -> Fields )

Table_Measure_Gender= {

    (".Gender_M_Brasil",NAMEOF('FAT_Table'[.Gender_M_Brasil]), 0),

    (".Gender_F_Brasil",NAMEOF('FAT_Table'[.Gender_F_Brasil]), 1),

    (".Gender_M_Argentina", NAMEOF('FAT_Table'[.Gender_M_Argentina]), 2),

    (".Gender_F_Argentina", NAMEOF('FAT_Table'[.Gender_F_Argentina]), 3)

}

Column_DynamicGroup = SUBSTITUTE('Table_Measure_Gender'[Table_Measure_Gender],"M_","")

IF(SEARCH("M_",'Table_Measure_Gender'[Table_Measure_Gender],1,0),

    SUBSTITUTE('Table_Measure_Gender'[Table_Measure_Gender],"M_",""),

    SUBSTITUTE('Table_Measure_Gender'[Table_Measure_Gender],"F_","")

)