I was told that i would be induced be induced by the gel.... I was told that it was still safe and not as hard as being induced by the drip...
It's doesn't really matter how they want to do the induction, the best chance for your VBAC is to go into labour on your own. Any sort of induction (even ARM, which doesn't always start labour within the "timeframes" they allow you for a vbac) carries a higher risk of you ending up in theatre again than you would have if labour starts when body and baby are ready.

I know that it really sucks to hear that, and it's probably not what you want to hear...I also know how you feel freaking out about the GD/Big baby issue because I had GD twice myself. As kelly already pointed out fundal height measurements are so useless many ob's and midwives don't even do them - I never had it done once in either of my GD pregnancies. So try not to put too much weight (bad pun!) on them saying the baby measures 40 weeks because it's more than possible that it doesn't.

Ultimately it's your decision, and it's soooo hard to think clearly and objectively when you just so miserable and uncomfortable and over it. But you're nearly there, see if you can hang in there just a bit longer...one day at a time