**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 quarterly report on Form 10-Q of the Company; (2) Based on my knowledge, this quarterly report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary to make the statements made, in lightof the circumstances under which such statements were made, not misleading with respect to theperiod covered by this quarterly report; (3) Based on my knowledge, the financial statements, and other financial information included inthis quarterly report, fairly present in all material respects the financial condition,results of operations and cash flows of the Company as of, and for, the periods presented inthis quarterly 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 quarterly 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 andprocedures and presented in this quarterly report our conclusions about theeffectiveness of the disclosure controls and procedures, as of the end of the periodcovered by this quarterly report based on such evaluation; and  (d) disclosed in this quarterly report any change in the Company’s internalcontrol over financial reporting that occurred during the Company’s most recentquarter that has materially affected, or is reasonably likely to materially affect theCompany’s internal 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 toadverselyaffect the Company’s ability to record, process, summarize and report financialinformation; 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:  June 29, 2006 /s/ W. Bruce Turner   W. Bruce Turner   President and Chief Executive Officer