How can I share information with the seller about their listing in GNMLS?

You can share information by emailing them the SellerHub for that listing.

Look under the tools gear to View the SellerHub and email access to your seller.

SellerHub

They will have access to viewing statistics about the listing, any showing feedback you have put in to share with them, the current status of the listing including price, remarks and photos.

For a full introduction from RealtyServer click: SellerHub