You can have up to 6 shops and galleries combined with a Gold Account, and you can choose whatever combination you like for them. You also don't lose any of your shops or galleries when your Gold Account expires, although if you have more than 4 when it expires, you won't be able to create any others until you're back down to a total of 4.

If you do delete any of them, make sure that you've emptied all the items out and collected tills from shops before you delete the shop or gallery!