Hi,
I'm afraid that we still have some troubles to understand what you want to say.
For what gateway is your custom payment plugin ?
What do you want to do with that plugin ?
You can put your plugin as attachment in a forum post. But I'm afraid that without concret details about your plugin we won't be able to give you more advice, because we do not understand.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.