PC 5448 Default Gateway

I have two segments connected together by a 5448 with two VLANs. VLAN 1 hosts clients in 192.168.4.0 and VLAN 2 (A Single Switch Port) connects back to main subnet 192.168.1.0, routing between the two segments is provided by the 5448.  This has worked well for us for years and there is no issue with the configuration. I am in the process of migrating clients off of Proxy for Internet access and will need those machines to access default gateway address on main network.  Currently for this configuration to work the Default Gateway setting on clients in the remote subnet must be set to the IP address of the switch or routing across the two segments does not occur. I need those clients in the remote segment to be able to interact with a default gateway on the 192.168.1.0 network.  Can I achieve this by setting a default gateway on the VLAN 2 (192.168.1.0) interface?

So workstations would still have their default gateway address pointing at the switch and the switch would route traffic destined to the "outside" to the actual default gateway. Current setup is Proxy, so clients don't need to know about the outside world, they just need to be able to ping the Proxy Server.