Ecommerce platform integration of Xumm

Our platform is an e commerce platform, think ebay / facebook business's type of app.

We currently integrating xumm/xrpl as a payments solution and are interested about finding out more about pathing and using gatehub as an off ramp.

With respect to pathing the store owner can decided what he wants payment in and the user can pay in what they choose and it gets converted - is this possible via the xmm sdk

In terms of off ramp, what is the best possible solution ?

If memory serves me correct im sure i viewed a tweet where by you guys mentioned you can use gatehub - i have searched my bookmarks but cannot find the reference.