I think these factors are mutually exclusive. The test can certainly upset your stomach without being an indicator of GD and you can absolutely tolerate it well but have GD. I would not think of vomiting in anyway as a GD indicator or non-indicator. If the test was "Does this girl barf when we make her drink this?" they wouldn't draw your blood so many times.
Re: Results after not being able to keep the 3 hour glucose test down
Married: 9.22.12 - DD: 1.7.14 - EDD 2: 10.30.17 - J14 OG