I, J. Christopher Donahue, certify that:
1. I have reviewed this report on Form N-CSR of Federated GNMA Trust
("registrant");
2. Based on my knowledge, this report does not contain any untrue
statement of a material fact or omit to state a material fact
necessary to make the statements made, in light of the circumstances
under which such statements were made, not misleading with respect
to the period covered by this report;
3. Based on my knowledge, the financial statements, and other financial
information included in this report, fairly present in all material
respects the financial condition, results of operations, changes in
net assets, and cash flows (if the financial statements are required
to include a statement of cash flows) of the registrant as of, and
for, the periods presented in this report;
4. The registrant's other certifying officers and I are responsible for
establishing and maintaining disclosure controls and procedures (as
defined in rule 30a-3(c) under the Investment Company Act of 1940)
for the registrant and have:
a. designed such disclosure controls and procedures, or caused such
disclosure controls and procedures to be designed under our
supervision, to ensure that material information relating to
the registrant, including its consolidated subsidiaries, is
made known to us by others within those entities, particularly
during the period in which this report is being prepared;
b. NA
c. evaluated the effectiveness of the registrant's disclosure controls
and procedures and presented in this report our conclusions
about the effectiveness of the disclosure controls and
procedures, as of a date within 90 days prior to the filing
date of this report based on such evaluation; and
d. disclosed in this report any change in the registrant's internal
control over financial reporting that occurred during the
registrant's most recent fiscal half-year (the registrant's
second half-year in the case of an annual report) that has
materially affected, or is reasonably likely to materially
affect, the registrant's internal control over financial
reporting; and
5. The registrant's other certifying officers and I have disclosed to
the registrant's auditors and the audit committee of the
registrant's board of directors (or persons performing the
equivalent functions):
a. all significant deficiencies and material weaknesses in the design
or operation of internal control over financial reporting
which are reasonably likely to adversely affect the
registrant's ability to record, process, summarize, and report
financial information; and
b. any fraud, whether or not material, that involves management or
other employees who have a significant role in the
registrant's internal control over financial reporting.
Date: September 23, 2003
/S/ J. Christopher Donahue
President - Principal Executive Officer
I, Richard J. Thomas, certify that:
1. I have reviewed this report on Form N-CSR of Federated GNMA Trust
("registrant");
2. Based on my knowledge, this report does not contain any untrue
statement of a material fact or omit to state a material fact
necessary to make the statements made, in light of the circumstances
under which such statements were made, not misleading with respect
to the period covered by this report;
3. Based on my knowledge, the financial statements, and other financial
information included in this report, fairly present in all material
respects the financial condition, results of operations, changes in
net assets, and cash flows (if the financial statements are required
to include a statement of cash flows) of the registrant as of, and
for, the periods presented in this report;
4. The registrant's other certifying officers and I are responsible for
establishing and maintaining disclosure controls and procedures (as
defined in rule 30a-3(c) under the Investment Company Act of 1940)
for the registrant and have:
a. designed such disclosure controls and procedures, or caused such
disclosure controls and procedures to be designed under our
supervision, to ensure that material information relating to
the registrant, including its consolidated subsidiaries, is
made known to us by others within those entities, particularly
during the period in which this report is being prepared;
b. NA
c. evaluated the effectiveness of the registrant's disclosure controls
and procedures and presented in this report our conclusions
about the effectiveness of the disclosure controls and
procedures, as of a date within 90 days prior to the filing
date of this report based on such evaluation; and
d. disclosed in this report any change in the registrant's internal
control over financial reporting that occurred during the
registrant's most recent fiscal half-year (the registrant's
second half-year in the case of an annual report) that has
materially affected, or is reasonably likely to materially
affect, the registrant's internal control over financial
reporting; and
5. The registrant's other certifying officers and I have disclosed to
the registrant's auditors and the audit committee of the
registrant's board of directors (or persons performing the
equivalent functions):
a. all significant deficiencies and material weaknesses in the design
or operation of internal control over financial reporting
which are reasonably likely to adversely affect the
registrant's ability to record, process, summarize, and report
financial information; and
b. any fraud, whether or not material, that involves management or
other employees who have a significant role in the
registrant's internal control over financial reporting.
Date: September 23, 2003
/S/ Richard J. Thomas
Treasurer - Principal Financial Officer