If I am right (I am member of PSR TUTORIAL FORUM from years), this is a site for Yamaha arranger keyboards.

You may get there a lot of styles, but for Yamaha arrangers and in Yamaha format.
Yes, you are right, there is a page for G-70, as there are pages for Kn-7000, SD-1, Roland G-1000 and others arrangers from different manufacturers. But these pages have its styles converted for Yamaha.

If there are a new page for Roland G-70 styles in Roland format, it will be the first new. But I don't think so, and I can't find this page.