Dave,
You can copy and paste panels between ccfs in Tonto. If nothing else just use control c to copy and control v to paste from the tree structure. Of course you're going to lose any jumps or aliases.
You're talking about a gallery in PE. There are no galleries in Tonto. Tonto does support themes, does have a display of all current icons in use in the ccf, and as you mention you can copy and paste between ccfs. If you have a gallery that you like, just open it as a ccf in Tonto.
Jim L