<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 JUNE 30, 2000 AND IS QUALIFIED IN
ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUN-30-2000
<CASH> 29,374,000
<SECURITIES> 150,000
<RECEIVABLES> 49,471,000
<ALLOWANCES> (8,848,000)
<INVENTORY> 0
<CURRENT-ASSETS> 117,187,000
<PP&E> 994,929,000
<DEPRECIATION> (151,169,000)
<TOTAL-ASSETS> 1,032,611,000
<CURRENT-LIABILITIES> 37,061,000
<BONDS> 0
0
0
<COMMON> 134,996,000
<OTHER-SE> (590,347)
<TOTAL-LIABILITY-AND-EQUITY> 1,032,611,000
<SALES> 120,493,000
<TOTAL-REVENUES> 120,493,000
<CGS> 75,236,000
<TOTAL-COSTS> 193,203,000
<OTHER-EXPENSES> (5,191,000)
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 39,470,000
<INCOME-PRETAX> (110,060,000)
<INCOME-TAX> 0
<INCOME-CONTINUING> (110,060,000)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> (110,060,000)
<EPS-BASIC> 0.0
<EPS-DILUTED> 0.0
</TABLE>