Ironically the two plugins I need aren't available in Nop 2.5.
I actually need the USAEPay plugin and the Paypal Express plugin. I can't figure out what's going on with the Paypal Plugin. When I search the forums I see the 2.4 plugin...that is a third party tool....but I don't see anything for 2.5.
If you have already written the gateway previously in the webforms version it should be fairly easy to write a pluggin just copy one of the other payment puggins that closely matches the process.
You can probaly get the 2.4 paypal one to work in 2.5 just modify the Description.txt file and change SupportedVersions from 2.4 to 2.5 - it may not work but worth a try