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