My graduation % are very less (45%) But I have good work experience of 5+ years, and I'm. Planning to give GMAT in October, So i'm eligible for master program?

Every University has its own set of entry requirements. However, there is a general eligibility criterion that is utilized by the majority of the universities. The fundamental eligibility criteria set by the universities for pursuing a Master's program are listed below: 

A minimum of 50% in the bachelor's degree. 
Excellent scores on the English proficiency test
Updated resume
Academic documents 
At least two years of professional work experience
Good GMAT test scores 

About your situation, your graduation scores are low. However, your work experience is upto the mark. Therefore, my suggestion to you regarding this situation is that you first need to decide which course you wish to opt for. Secondly, give your 100% in preparing for your GMAT test. Aim to score well on your GMAT test, as universities consider a good GMAT score a great sign. Furthermore, provide your updated CV mentioning all the required skills and abilities. Also, give a statement of purpose stating why you desire to pursue a master's in that specific University, why you choose to study that particular course, and what your plans are. 

This way, you will have a good chance of getting admission into a master's program and pursuing your studies abroad.