To the best of my understanding of your original question, and your clarification of your spec, my answer is to your question. Maybe my [gAdditionalComment] is the same as your existing [gComments] column though ...
[gComments] exists for each answer, to each question. Therefore it is possible to store a Comment against each question (i.e. under program control only where the user providing a rating of 1 or 2)
It seems that, in addition, you have a [gAdditionalComments] column that the user can answer, ONCE, for each questionnaire ... but I can't see that you have a table for that?
If I was designing a Questionaire system I would want it to be able to handle different questionnaires.
I would have a QuestionaireHeader table - that would have an QH_ID and a descriptive name.
Then a QuestionaireItems table containing the individual questions within a specific Questionnaire. That table would have a column for a (Foreign Key) link to QH_ID, and an ITEM column. Also the Text of the Question, and maybe the date/time when it was last changed.
Next a table of Questionnaire Choices / Answers. That would need a column(s) linking to the QuestionaireItem (either columns for both QH_ID and ITEM, or provide an additional Unique ID / Identity column in the QuestionaireItems table)
Then we need tables for the User's actual responses. A UserResponseHeader table - this would link to the QuestionaireHeader QH_ID column (so we know which Questionnaire the user was answering), and have its own unique ID / Identity, e.g. URH_ID and also hold the User's ID / Name, the Date they answered the questionnaire - whatever else you need about their "session". That could include an overall, optional, Comment about the whole thing.
Then a table of UserResponseItems which would have one row for each QuestionaireItem with a link to the UserResponseHeader URH_ID and also to the QuestionaireItem (again: either a combination of QH_ID and ITEM, or provide an additional Unique ID / Identity column in the QuestionaireItems table), and then finally the value of the Choice that they picked, plus also the Comment if their choice was 1 or 2.