**Exhibit 31.1****CERTIFICATIONS**     I, Gary Greenfield, certify that:     1. I have reviewed this Annual Report on Form 10-K ofGXS Corporation;     2. Based on my knowledge, this report does not contain anyuntrue statement of a material fact or omit to state a materialfact necessary to make the statements made, in light of thecircumstances under which such statements were made, notmisleading with respect to the period covered by this report;     3. Based on my knowledge, the financial statements, andother financial information included in this report, fairlypresent in all material respects the financial condition,results of operations and cash flows of the registrant as of,and for, the periods presented in this report;     4. The registrant’s other certifying officer(s) and Iare responsible for establishing and maintaining disclosurecontrols and procedures (as defined in Exchange ActRules 13a-15(e) and 15d-15(e)) and internal control overfinancial reporting (as defined in Exchange ActRules 13a-15(f) and 15d-15(f)) for the registrant and have:     a) Designed such disclosure controls and procedures, orcaused such disclosure controls and procedures to be designedunder our supervision, to ensure that material informationrelating to the registrant, including its consolidatedsubsidiaries, is made known to us by others within thoseentities, particularly during the period in which this report isbeing prepared;     b) Designed such internal control over financial reporting,or caused such internal control over financial reporting to bedesigned under our supervision, to provide reasonable assuranceregarding the reliability of financial reporting and thepreparation of financial statements for external purposes inaccordance with generally accepted accounting principles;     c) Evaluated the effectiveness of the registrant’sdisclosure controls and procedures and presented in this reportour conclusions about the effectiveness of the disclosurecontrols and procedures, as of the end of the period covered bythis report based on such evaluation; and     d) Disclosed in this report any change in theregistrant’s internal control over financial reporting thatoccurred during the registrant’s most recent fiscal quarter(the registrant’s fourth fiscal quarter in the case of anannual report) that has materially affected, or is reasonablylikely to materially affect, the registrant’s internalcontrol over financial reporting; and     5. The registrant’s other certifying officer(s) and Ihave disclosed, based on our most recent evaluation of internalcontrol over financial reporting, to the registrant’sauditors and the audit committee of the registrant’s boardof directors (or persons performing the equivalent functions):     a) All significant deficiencies and material weaknesses inthe design or operation of internal control over financialreporting which are reasonably likely to adversely affect theregistrant’s ability to record, process, summarize andreport financial information; and     b) Any fraud, whether or not material, that involvesmanagement or other employees who have a significant role in theregistrant’s internal control over financial reporting.       Date: March 31, 2005     /s/ Gary Greenfield