**Exhibit 31.1**CERTIFICATIONI, W. Bruce Turner, President and Chief Executive Officer of GTECH Holdings Corporation (the“Company”), certify that:(1) I have reviewed this annual report on Form 10-K of the Company; (2) Based on my knowledge, this annual report does not contain any untrue statement of a materialfact or omit to state a material fact necessary to make the statements made, in light of thecircumstances under which such statements were made, not misleading with respect to the periodcovered by this annual report; (3) Based on my knowledge, the financial statements, and other financial information included inthis annual report, fairly present in all material respects the financial condition, resultsof operations and cash flows of the Company as of, and for, the periods presented in thisannual report; (4) The Company’s other certifying officer and I are responsible for establishing and maintainingdisclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e)) and internalcontrol over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f))for the Company and have: (a) designed such disclosure controls and procedures, or caused such disclosurecontrols and procedures to be designed under our supervision, to ensure that materialinformation relating to the Company, including its consolidated subsidiaries, is madeknown to us by others within those entities, particularly during the period in whichthis annual report was being prepared;  (b) designed such internal control over financial reporting, or caused suchinternal control over financial reporting to be designed under our supervision, toprovide reasonable assurance regarding the reliability of financial reporting and thepreparation of financial statements for external purposes in accordance with generallyaccepted accounting principles;  (c) evaluated the effectiveness of the Company’s disclosure controls and proceduresand presented in this annual report our conclusions about the effectiveness of thedisclosure controls and procedures, as of the end of the period covered by this annualreport based on such evaluation; and  (d) disclosed in this annual report any change in the Company’s internal controlover financial reporting that occurred during the Company’s fourth fiscal quarter thathas materially affected, or is reasonably likely to materially affect, the Company’sinternal control over financial reporting; and(5) The Company’s other certifying officer and I have disclosed, based on our most recentevaluation, of internal control over financial reporting, to the Company’s auditors and theaudit committee of the Company’s board of directors: (a) all significant deficiencies and material weaknesses in the design oroperation of internal control over financial reporting which are reasonably likely toadversely affect the Company’s ability to record, process, summarize and reportfinancial information; and  (b) any fraud, whether or not material, that involves management or otheremployees who have a significant role in the Company’s internal control over financialreporting.        Date: April 20, 2006 /s/ W. Bruce Turner   W. Bruce Turner   President and Chief Executive Officer