I've had issues with Google using meta descriptions from images instead of the page's meta description. It would be great to have a better solution for controlling SERPs
I'm so sorry that your inquiry hasn't been answered on time.
May I know if the issue has been resolved yet? if not, kindly send me the link of the page you're working on via firstname.lastname@example.org
For your information, we're working the feature which allows us to add meta description right on GemPages editor instead of go all the way on Shopify Admin.
Looking forward to hearing from you soon.
All the best!