[Stinged]

I'll be giving an example as GetAdminLevel, you can change that of course.
In your gamemode:

pawn Код:

forward GetAdminLevel(playerid);
public GetPlayerAdmin(playerid)
{
    return YourAdminVariable[playerid];
}

In your filterscript:

pawn Код:

#define GetAdminLevel(%0) CallRemoteFunction("GetAdminLevel", "i", %0)

Or

pawn Код:

GetAdminLevel(playerid)
{
    return CallRemoteFunction("GetAdminLevel", "i", playerid);
}

I think the #define one is quicker as it's just CallRemoteFunction but with a different name and parameters.