Andi - I'm pretty similar. 5.5 fasting, and below 7 2 hours after main meals.
So far the highest I've gotten was 6.8, and I panicked, but I email my diabetes educator every week with numbers, and while I was stressed, she was perfectly happy as I rarely go above 6.1/6.2. Generally dinner is my highest reading.
33 weeks today, have an appt with my OB for the first time since finding out about my GD, so will be good to find out her opinions on whether she likes to induce early etc.