Disney has been doing a wonderful job; in the parks, on transportation, in the resorts, in the lines, on the rides, outdoor dining, indoor dining. The only times we felt wary was walking around in the general areas of the parks. Kind of impossible to fully control where and how people walk and how close they get to each other.
We felt very safe in all the restaurants. Garden Grill was no exception. The tables are spread out, the servers are in masks and stay a reasonable distance.