GSA 05AR3 - Price/Yield - 5A1

Balance	$185,438,000.00	Delay	24
Coupon	5.07071	Dated	5/1/2005
Settle	5/27/2005	First Payment	6/25/2005
Price	15 CPB	20 CPB	25 CPB	30 CPB	35 CPB
100-21+	4.77409	4.72969	4.67983	4.62257	4.55855	Yield
100-21+	62	62	62	61	59	Spread
100-23+	4.75253	4.70542	4.65252	4.59178	4.52385	Yield
100-23+	60	60	59	58	55	Spread
100-25+	4.73099	4.68118	4.62524	4.56102	4.48920	Yield
100-25+	58	57	57	55	52	Spread
100-27+	4.70947	4.65696	4.59800	4.53029	4.45459	Yield
100-27+	56	55	54	51	48	Spread
100-29+	4.68797	4.63277	4.57078	4.49960	4.42002	Yield
100-29+	54	53	51	48	45	Spread
100-31+	4.66649	4.60860	4.54359	4.46894	4.38549	Yield
100-31+	52	50	48	45	41	Spread
101-01+	4.64503	4.58445	4.51642	4.43832	4.35100	Yield
101-01+	49	48	46	42	38	Spread
101-03+	4.62359	4.56032	4.48929	4.40773	4.31655	Yield
101-03+	47	45	43	39	35	Spread
101-05+	4.60217	4.53623	4.46219	4.37718	4.28214	Yield
101-05+	45	43	40	36	31	Spread
101-07+	4.58077	4.51215	4.43511	4.34666	4.24778	Yield
101-07+	43	41	38	33	28	Spread
101-09+	4.55939	4.48810	4.40806	4.31617	4.21345	Yield
101-09+	41	38	35	30	24	Spread
101-11+	4.53802	4.46407	4.38104	4.28572	4.17916	Yield
101-11+	39	36	32	27	21	Spread
101-13+	4.51668	4.44006	4.35405	4.25531	4.14492	Yield
101-13+	37	33	30	24	17	Spread
101-15+	4.49536	4.41608	4.32709	4.22492	4.11071	Yield
101-15+	34	31	27	21	14	Spread
101-17+	4.47405	4.39213	4.30015	4.19457	4.07654	Yield
101-17+	32	29	24	18	11	Spread
101-19+	4.45277	4.36819	4.27325	4.16425	4.04242	Yield
101-19+	30	26	21	15	7	Spread
101-21+	4.43151	4.34428	4.24637	4.13397	4.00833	Yield
101-21+	28	24	19	12	4	Spread
WAL	3.23	2.85	2.52	2.22	1.95
Mod Durn	2.87	2.56	2.27	2.02	1.79
Principal Window	Jun05 - Apr10	Jun05 - Apr10	Jun05 - Apr10	Jun05 - Apr10	Jun05 - Apr10
LIBOR_1MO	3.0888	3.0888	3.0888	3.0888	3.0888
LIBOR_6MO	3.4087	3.4087	3.4087	3.4087	3.4087
LIBOR_1YR	3.6862	3.6862	3.6862	3.6862	3.6862
CMT_1YR	3.3400	3.3400	3.3400	3.3400	3.3400
Optional Redemption	Call (N,N)	Call (N,N)	Call (N,N)	Call (N,N)	Call (N,N)

Swaps	Mat    3MO    6MO    1YR     2YR     3YR     4YR     5YR     6YR     7YR     8YR     9YR    10YR
	Yld 3.2194 3.4312 3.7113 3.98433 4.12804 4.22492 4.30629 4.37825 4.44611 4.50794 4.56625 4.62085