SHAW XB7 MultiWan

[silverhoof]

i currently use a Checkpoint PB-20 i7-4790k 16GB Ram with 4 port 10gb sfp+ expansion as my firewall

currently i use the single 2.5gb interface for the primary wan ip and the other 2 are routed with gigabit interface.
I want to use the 2.5gb interface to route all 3 ips to the firewall on 2.5gb. all the static ips are collected using DHCP and if applied statically will be blocked after a couple days (thank you shaw for poor fuzzy mac locking) and are all on different subnets meaning that each will need a different gateway. does this seem possible to attain?
i want to avoid using my 10gb switch and having to route 4 connections just for ips and service