There's a new Shop icon on your screen and it is a one stop shop that players have access to at nearly every point in the game. Zeke will no longer be an equipment shop, and items previously sold by Zeke can now be found in the regular Shopkeeps of the worlds of the Spiral as well as on the bosses of the Spiral.
Gold can be purchased here, just like it was previously offered on Zeke.
even though I know KI would love for you to do that. I would not recommend purchasing gold with crowns. Crowns are real money... you can earn the money in the game for free! Save the crowns for 2nd chance chests, and crown gear, etc...