Exhibit 99.23 GE CAPITAL MORTGAGE SERVICES, INC. SERVICER'S CERTIFICATE October, 1999 Series 1999-12, REMIC Multi-Class Pass-Through Certificates Pursuant to the Pooling and Servicing Agreement dated as of May 1, 1999 (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 $ 687,923.17 --------------- (b) Interest $ 1,042,225.13 --------------- (c) Total $ 1,730,148.30 --------------- 2. Aggregate scheduled Monthly Payments received this month: (a) Principal $ 497,726.45 --------------- (b) Interest $ 736,444.86 --------------- (c) Total $ 1,234,171.31 --------------- 3. Aggregate Monthly Advances this month: (a) Principal $ 190,196.72 --------------- (b) Interest $ 305,780.27 --------------- (c) Total $ 495,976.99 --------------- 4. Aggregate Principal Prepayments in part received in the applicable Prepayment Period: (a) Principal $ 87,420.53 --------------- 5. Aggregate Principal Prepayments in full received in the applicable Prepayment Period: (a) Principal $ 1,070,807.43 --------------- (b) Interest $ 6,049.36 --------------- (c) Total $ 1,076,856.79 --------------- 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: $ 181,508,031.80 --------------- 13. Available Funds: $ 2,856,426.95 --------------- 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: $ 1,694.30 --------------- 18. Total interest payments: $ 1,010,275.83 --------------- 19. Interest Unpaid Class Accrued Certificate Interest Shortfalls Interest Class Interest Payable Pay-out Rate - ----- -------- ------------------- ------- ------------ R $ 0.00 $ 0.00 $ 0.00 %0.000000000 PO $ 0.00 $ 0.00 $ 0.00 %0.000000000 A1 $ 63,815.38 $ 0.00 $ 63,815.38 %6.250000449 A2 $ 222,585.07 $ 0.00 $ 222,585.07 %6.250000018 A3 $ 643,877.45 $ 0.00 $ 643,877.45 %6.249999984 S $ 57,747.08 $ 0.00 $ 57,747.08 %0.415991756 M $ 8,895.51 $ 0.00 $ 8,895.51 %6.250000220 B1 $ 3,464.78 $ 0.00 $ 3,464.78 %6.249994457 B2 $ 2,966.88 $ 0.00 $ 2,966.88 %6.249998135 B3 $ 3,459.65 $ 0.00 $ 3,459.65 %6.249999906 B4 $ 1,976.21 $ 0.00 $ 1,976.21 %6.250001318 B5 $ 1,487.82 $ 0.00 $ 1,487.82 %6.249995405 20. Principal Distribution Amount: $ 1,846,151.12 --------------- 21. Principal Distribution Amount per Certificate: Principal Distribution Accrual Amount ---------------------- -------------- Class R $ 0.00 $ 0.00 Class PO $ 1,884.63 $ 0.00 Class A1 $ 45,971.71 $ 0.00 Class A2 $ 516,879.43 $ 0.00 Class A3 $ 1,265,386.15 $ 0.00 Class S $ 0.00 $ 0.00 Class M $ 6,408.20 $ 0.00 Class B1 $ 2,495.98 $ 0.00 Class B2 $ 2,137.30 $ 0.00 Class B3 $ 2,492.28 $ 0.00 Class B4 $ 1,423.63 $ 0.00 Class B5 $ 1,071.81 $ 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 ----- ------------------- ------------------- B1 $ 0.00 $ 0.00 B2 $ 0.00 $ 0.00 B3 $ 0.00 $ 0.00 B4 $ 0.00 $ 0.00 B5 $ 0.00 $ 0.00 25. Unanticipated Recoveries: $ 0.00 --------------- B. Other Amounts for such Distribution Date: 1. Prepayment Distribution Triggers satisfied: Yes No --- -- Class-B1 X Class-B2 X Class-B3 X Class-B4 X Class-B5 X 2. Base Servicing Fee amount: $ 37,488.15 ---------- 3. Supplemental Servicing Fee amount: $ N/A ---------- 4. Credit Losses for prior month: $ 0.00 ---------- Category A Category B Category C 5. Senior Percentage: % 97.664023 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: % 2.335977 ----------- 12. Junior Prepayment Percentage: % 0.000000 ----------- Capitalized terms used in this Certificate shall have the same meanings as in the Agreement. GE CAPITAL MORTGAGE SERVICES, INC. By: /s Tim Neer ------------------------------- Tim Neer Vice President Investor Services