<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM GST USA'S
FORM 10-Q FOR THE QUARTER ENDED SEPTEMBER 30, 2000 AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> SEP-30-2000
<CASH> 30,685,000
<SECURITIES> 10,152,000
<RECEIVABLES> 52,431,000
<ALLOWANCES> (8,718,000)
<INVENTORY> 0
<CURRENT-ASSETS> 132,873,000
<PP&E> 652,158,000
<DEPRECIATION> 0
<TOTAL-ASSETS> 791,202,000
<CURRENT-LIABILITIES> 65,281,000
<BONDS> 0
0
0
<COMMON> 134,996,000
<OTHER-SE> 0
<TOTAL-LIABILITY-AND-EQUITY> 791,202,000
<SALES> 84,991,000
<TOTAL-REVENUES> 184,991,000
<CGS> 114,419,000
<TOTAL-COSTS> 541,916,000
<OTHER-EXPENSES> (7,517,000)
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 40,910,000
<INCOME-PRETAX> (403,095,000)
<INCOME-TAX> 0
<INCOME-CONTINUING> (403,095,000)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> (403,095,000)
<EPS-BASIC> 0
<EPS-DILUTED> 0
</TABLE>