What is difference between gpos and rtos?

an RTOS is much better than anormal OS because it is time sensitive, fault tolerable and allow multitasking(note :- task and process are different). that are not supported by all OSs

A real-time operating system is intended for systems that need to tightly control responsiveness and performance. With an RTOS you can prioritize operations such that the most critical areas of the application get control of the processor exactly when they need it. All other lower priority operations are paused.

An RTOS also gives you all of the other advantages of an OS:

• a consistent coding platform
• a rich set of APIs to save coding time and errors
• processor housekeeping functions
• hardware abstraction