Custom payment gateway to Joomla Booking Module

I have installed Booking Bus Pro module in my Joomla 2.5 website ([login to view URL]). I built a php payment gateway that is linked to a local bank. ( I will provide link to my custom payment gateway ). This joomla booking module have some payment gateways installed but obviously they doesn't have my custom payment gateway installed. I need a php-mysql devolper to make this integration, I will provide all info. I tried to made it myself, but honestly time is passing by, and my deadline is almost reached.