GNUGK-How to setup static gateway to gateway routing

Dear Sir

I am a newbie in the world of IP telephony. I have been working with Asterisk PBX (SIP) and Cisco Call Manager (MGCP) but now I am learning on how to work GNUGK for H.323 Gatekeeper.

I am having a problem, configuring static call routing on GNUGK

in the section

[RasSrv::GWPrefixes]

Remote1=203.
Remote2=486.
Local-router1 = 0...,1...,01.........,1.......,0......,1......,2...,3...,4...,5...,6...,7...,8...

Local-router2 = 0...,1...,01.........,1.......,0......,1......,2...,3...,4...,5...,6...,7...,8....

You can see that the routers Local-router1 and 2 has the same dialling plan.

What happens is the gatekeeper send calls randomly to one router or to the other when one of the matching extension is dialled.

What I am trying to do is to force

any calls coming from Remote1 to go out only throught Local-router1

Remote1 =========================> Local-router1

and any calls from Remote2 to go out throught Local-router2

Remote2 =========================> Local-router2

please tell me if there is any way of doing that, I have tried many things here and I am out of ressources.

Thank you in advance for your help
Roland