It sounds perectly normal to me for your stage of pregnancy.. Maybe a close borderline ( I have had GD with all 4 pregnancies and insulin for the last 3)

My 3 hour test showed similar numbers to your but my one hour number was 10.2.. and the 3 hour one was 7 ( if I remember correctly)

the numbers you are getting before and after meals sound fine to me.. It is good they are keeping an eye on it though even though it is a pain.

Although reading back.. they wanted under 5.5 before meals and under 7.5 for after.... So they might be keeping an eye on your before meal numbers