Are there other routes from Zhuhai to Guilin by train other than going through Guangzhou?

There is no direct rail service between Zhuhai and Guilin. To travel by train, a transfer in Guangzhou shall be the most convenient way.

Yes, but everything is already sold out from guangzhou for the weekends I am able to travel. That is why I was wondering about other train route options...
Are there any others? Even if not as convenient?

Thank you

Then you can consider taking a long-distance bus from Zhuhai Gongbei Bus Station or Xiangzhou Bus Station to Shenzhen first. Then head for Shenzhen North Rail Station to take a high-speed train to Guilin in around 3.5h. You'd better book the train tickets in advance.