If the last field in your insert is a date type field, you don't need to convert SYSDATE, so the following should be fine:
insert into GtTable values('111', 'Name', 300, 'Tour', to_date('02/04/2012','DD/MM/YYYY'), sysdate);
But if this is a varchar field, then the following should work:
insert into GtTable values('111', 'Name', 300, 'Tour', to_date('02/04/2012','DD/MM/YYYY'), to_char(sysdate, 'dd/mm/yyyy'));
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