Exhibit 99.21 GE CAPITAL MORTGAGE SERVICES, INC. SERVICER'S CERTIFICATE January, 1999 Series 1998-08B, REMIC Multi-Class Pass-Through Certificates Pursuant to the Pooling and Servicing Agreement dated as of April 1, 1998 (the "Agreement") between GE Capital Mortgage Services, Inc. (the "Company") and State Street Bank (the "Trustee"), governing the Certificates referred to above, the Company hereby certifies to the Trustee: With respect to the Agreement and as of the Determination Date for this month: A. Mortgage Loan Information: 1. Aggregate scheduled Monthly Payments: (a) Principal $ 123,648.74 --------------- (b) Interest $ 926,588.64 --------------- (c) Total $ 1,050,237.38 --------------- 2. Aggregate scheduled Monthly Payments received this month: (a) Principal $ 116,313.45 --------------- (b) Interest $ 870,475.95 --------------- (c) Total $ 986,789.40 --------------- 3. Aggregate Monthly Advances this month: (a) Principal $ 7,335.29 --------------- (b) Interest $ 56,112.69 --------------- (c) Total $ 63,447.98 --------------- 4. Aggregate Principal Prepayments in part received in the applicable Prepayment Period: (a) Principal $ 25,703.36 --------------- 5. Aggregate Principal Prepayments in full received in the applicable Prepayment Period: (a) Principal $ 2,480,562.65 --------------- (b) Interest $ 15,251.94 --------------- (c) Total $ 2,495,814.59 --------------- 6. Aggregate Insurance Proceeds received: (a) Principal $ 0.00 --------------- (b) Interest $ 0.00 --------------- (c) Total $ 0.00 --------------- 7. Aggregate Liquidation Proceeds received: (a) Principal $ 0.00 --------------- (b) Interest $ 0.00 --------------- (c) Total $ 0.00 --------------- 8. Aggregate Deficient Valuations with respect to the Mortgage Loans during the prior month: $ 0.00 --------------- 9. Aggregate Debt Service Reductions with respect to the Mortgage Loans during the prior month: $ 0.00 --------------- 10. Aggregate Purchase Prices for Defaulted Mortgage Loans: (a) Principal $ 0.00 --------------- (b) Interest $ 0.00 --------------- (c) Total $ 0.00 --------------- 11. Aggregate Purchase Prices for Defective Mortgage Loans: (a) Principal $ 0.00 --------------- (b) Interest $ 0.00 --------------- (c) Total $ 0.00 --------------- 12. Pool Scheduled Principal Balance: $ 149,954,977.78 --------------- 13. Available Funds: $ 3,487,855.71 --------------- 14. Realized Losses for prior month: $ 0.00 --------------- 15. Aggregate Realized Losses (a) Aggregate Realized Losses: $ 0.00 ------------------------ (b) Deficient Valuations: $ 0.00 ------------------------ (c) Debt Service Reductions: $ 0.00 ------------------------ (d) Bankruptcy Losses: $ 0.00 ------------------------ (e) Special Hazard Losses: $ 0.00 ------------------------ (f) Fraud Losses: $ 0.00 ------------------------ (g) Excess Bankruptcy Losses: $ 0.00 ------------------------ (h) Excess Special Hazard Losses: $ 0.00 ------------------------ (i) Excess Fraud Losses: $ 0.00 ------------------------ 16. Non-Credit Losses: $ 0.00 --------------- 17. Compensating Interest Payment: $ 2,584.20 --------------- 18. Total interest payments: $ 857,940.96 --------------- 19. Interest Unpaid Class Accrued Certificate Interest Shortfalls Interest Class Interest Payable Pay-out Rate - ----- -------- ------------------- ------- ------------ 2PO $ 0.00 $ 0.00 $ 0.00 % 0.000000000 2A1 $ 335,188.40 $ 0.00 $ 335,188.40 % 6.750000002 2A2 $ 88,229.17 $ 0.00 $ 88,229.17 % 7.000000264 2A3 $ 14,583.33 $ 0.00 $ 14,583.33 % 6.999998400 2A4 $ 16,041.67 $ 0.00 $ 16,041.67 % 7.000001455 2A5 $ 24,062.50 $ 0.00 $ 24,062.50 % 7.000000000 2A6 $ 25,211.49 $ 0.00 $ 25,211.49 % 7.000001157 2A7 $ 21,145.83 $ 0.00 $ 21,145.83 % 6.999998897 2A8 $ 21,145.83 $ 0.00 $ 21,145.83 % 6.999998897 2A9 $ 21,145.83 $ 0.00 $ 21,145.83 % 6.999998897 2A10 $ 21,145.83 $ 0.00 $ 21,145.83 % 6.999998897 2A11 $ 21,145.83 $ 0.00 $ 21,145.83 % 6.999998897 2A12 $ 58,587.58 $ 0.00 $ 58,587.58 % 6.200000335 2A13 $ 51,666.67 $ 0.00 $ 51,666.67 % 6.200000400 2A14 $ 98,437.50 $ 0.00 $ 98,437.50 % 6.750000000 2R $ 0.00 $ 0.00 $ 0.00 % 0.000000000 2M $ 19,118.26 $ 0.00 $ 19,118.26 % 6.749999936 2B1 $ 7,842.96 $ 0.00 $ 7,842.96 % 6.750001065 2B2 $ 3,924.27 $ 0.00 $ 3,924.27 % 6.749992356 2B3 $ 3,924.27 $ 0.00 $ 3,924.27 % 6.749992356 2B4 $ 1,956.55 $ 0.00 $ 1,956.55 % 6.750010113 2B5 $ 3,437.19 $ 0.00 $ 3,437.19 % 6.750001326 20. Principal Distribution Amount: $ 2,629,914.75 --------------- 21. Principal Distribution Amount per Certificate: Principal Distribution Accrual Amount ---------------------- -------------- Class 2PO $ 72.00 $ 0.00 Class 2A1 $ 2,624,051.16 $ 0.00 Class 2A2 $ 0.00 $ 0.00 Class 2A3 $ 0.00 $ 0.00 Class 2A4 $ 0.00 $ 0.00 Class 2A5 $ 0.00 $ 0.00 Class 2A6 $ 0.00 $ 0.00 Class 2A7 $ 0.00 $ 0.00 Class 2A8 $ 0.00 $ 0.00 Class 2A9 $ 0.00 $ 0.00 Class 2A10 $ 0.00 $ 0.00 Class 2A11 $ 0.00 $ 0.00 Class 2A12 $ 0.00 $ 0.00 Class 2A13 $ 0.00 $ 0.00 Class 2A14 $ 0.00 $ 0.00 Class SUP2 $ 0.00 $ 0.00 Class 2R $ 0.00 $ 0.00 Class 2M $ 2,754.12 $ 0.00 Class 2B1 $ 1,129.83 $ 0.00 Class 2B2 $ 565.32 $ 0.00 Class 2B3 $ 565.32 $ 0.00 Class 2B4 $ 281.85 $ 0.00 Class 2B5 $ 495.15 $ 0.00 22. Additional distributions to the Class R Certificate pursuant to the Agreement: $ 0.00 ----------------- 23. Additional distributions to the Class RL Certificate pursuant to the Agreement: $ 0.00 ----------------- 24. Subordinate Certificate Writedown Amount: $ 0.00 ----------------- Accumulative Class Supported Shortfall Supported Shortfall ----- ------------------- ------------------- 2B1 $ 0.00 $ 0.00 2B2 $ 0.00 $ 0.00 2B3 $ 0.00 $ 0.00 2B4 $ 0.00 $ 0.00 2B5 $ 0.00 $ 0.00 25. Unanticipated Recoveries: $ 0.00 ------------- B. Other Amounts for such Distribution Date: 1. Prepayment Distribution Triggers satisfied: Yes No --- -- Class-2B1 X Class-2B2 X Class-2B3 X Class-2B4 X Class-2B5 X 2. Base Servicing Fee amount: $ 34,552.32 ---------- 3. Supplemental Servicing Fee amount: $ 52,068.00 ---------- 4. Credit Losses for prior month: $ 0.00 ---------- Category Category Category A B C 5. Senior Percentage: % 95.313954 N/A N/A N/A ----------- ---- ------ ------ 6. Group I Senior Percentage: % N/A N/A N/A N/A ----------- ---- ------ ------ 7. Group II Senior Percentage: % N/A N/A N/A N/A ----------- ---- ------ ------ 8. Senior Prepayment Percentage: %100.000000 N/A N/A N/A ----------- ---- ------ ------ 9. Group I Senior Prepayment Percentage: % N/A N/A N/A N/A ----------- ---- ------ ------ 10. Group II Senior Prepayment Percentage: % N/A N/A N/A N/A ----------- ---- ------ ------ 11. Junior Percentage: % 4.686046 ----------- 12. Junior Prepayment Percentage: %100.000000 ----------- Capitalized terms used in this Certificate shall have the same meanings as in the Agreement. GE CAPITAL MORTGAGE SERVICES, INC. By: /s/ Tim Neer ------------------------------- Name: Tim Neer Title: Vice President Investor Operations