I use the windows machine as a VPN L2TP client with pair of mikrotik CHR 6.36.
I can aquire during the connection the WINS, DNS and IP adresses
But I cann't get the gateway adress. 
See the picture.
In the ppp profile I created the local and remote addresses. 
Bot nor one can't be assigned after the connection established.
The more strange thing is the routing os working.
I can't know why. But I can connect with the clients alogn my VPN.
I wrote this message because I have a problem with using the local DNS server at the my VPN network.
The resolving is working only few seconds after connection established. I think that it might be due to lask of default gateway.
Also notice that I signed to use the default remote gateway in windows settings.
So it seems that even modern VPN from mikrotik have a trobules with Windows 10 built in VPN

Hi
Go to cmd
you should type command route PRINT
take photo from it and then put photo here
Good Luck

I erased the public ip of VPN server from screen
In my virtual private network I use the 192.168.5.x subnet

Using PPP connection such PPTP / L2TP / SSTP, you do not get Default GW IP Address. PPP connection use's /32 mask, there is no more available IP address. All connection normally routing to VPN gateway.

It's good use different IP area than local network because then you have maybe routing issue. Please post your VPN configuration here.