Am I screwed? Not enough time for GMAT

So I am from a nontarget SEC school starting a job at a upper mid tier group at GS/MS/JPM. I was planning on taking the GMAT before starting training so it lasted five years in case I wanted to do the classic 2+2+2 path. Long story short some stuff got in the way, got busy with senior year and graduation etc. and I’ve only had time to really study for a week or two. I’m basically lights out on the reading comprehension and logic sections. My sentence correction is horrendous, and my quant is okay but needs lots of work to get perfect with all the tips and tricks. Is a month before training and a month during training enough to do the GMAT? Will I have time during training to study? Is it a big deal to not have taken it once you start work in IB? Also, what course would you recommend if I should try to cram it into this time frame? I got target test prep two weeks ago but it’s so long and In depth I feel like I would need three solid months to finish it. Any advice is appreciated.