Cubeorange serial3 and serial4 connections

The data output of the gps module I am using is rs232, do I need to convert it to ttl level to use it in cubeorange with gps1 or gps2?

If it’s true RS232, the voltage levels will be far too high. Cube UARTs operate at 3v3 logic levels.

The cubes use TTL level serial, (5v tolerant). Not RS232 levels.